2 * Kernel-based Virtual Machine driver for Linux
4 * derived from drivers/kvm/kvm_main.c
6 * Copyright (C) 2006 Qumranet, Inc.
9 * Avi Kivity <avi@qumranet.com>
10 * Yaniv Kamay <yaniv@qumranet.com>
12 * This work is licensed under the terms of the GNU GPL, version 2. See
13 * the COPYING file in the top-level directory.
17 #include <linux/kvm_host.h>
23 #include <linux/clocksource.h>
24 #include <linux/kvm.h>
26 #include <linux/vmalloc.h>
27 #include <linux/module.h>
28 #include <linux/mman.h>
29 #include <linux/highmem.h>
31 #include <asm/uaccess.h>
35 #define MAX_IO_MSRS 256
36 #define CR0_RESERVED_BITS \
37 (~(unsigned long)(X86_CR0_PE | X86_CR0_MP | X86_CR0_EM | X86_CR0_TS \
38 | X86_CR0_ET | X86_CR0_NE | X86_CR0_WP | X86_CR0_AM \
39 | X86_CR0_NW | X86_CR0_CD | X86_CR0_PG))
40 #define CR4_RESERVED_BITS \
41 (~(unsigned long)(X86_CR4_VME | X86_CR4_PVI | X86_CR4_TSD | X86_CR4_DE\
42 | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_MCE \
43 | X86_CR4_PGE | X86_CR4_PCE | X86_CR4_OSFXSR \
44 | X86_CR4_OSXMMEXCPT | X86_CR4_VMXE))
46 #define CR8_RESERVED_BITS (~(unsigned long)X86_CR8_TPR)
48 * - enable syscall per default because its emulated by KVM
49 * - enable LME and LMA per default on 64 bit KVM
52 static u64 __read_mostly efer_reserved_bits
= 0xfffffffffffffafeULL
;
54 static u64 __read_mostly efer_reserved_bits
= 0xfffffffffffffffeULL
;
57 #define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM
58 #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU
60 static int kvm_dev_ioctl_get_supported_cpuid(struct kvm_cpuid2
*cpuid
,
61 struct kvm_cpuid_entry2 __user
*entries
);
63 struct kvm_x86_ops
*kvm_x86_ops
;
65 struct kvm_stats_debugfs_item debugfs_entries
[] = {
66 { "pf_fixed", VCPU_STAT(pf_fixed
) },
67 { "pf_guest", VCPU_STAT(pf_guest
) },
68 { "tlb_flush", VCPU_STAT(tlb_flush
) },
69 { "invlpg", VCPU_STAT(invlpg
) },
70 { "exits", VCPU_STAT(exits
) },
71 { "io_exits", VCPU_STAT(io_exits
) },
72 { "mmio_exits", VCPU_STAT(mmio_exits
) },
73 { "signal_exits", VCPU_STAT(signal_exits
) },
74 { "irq_window", VCPU_STAT(irq_window_exits
) },
75 { "halt_exits", VCPU_STAT(halt_exits
) },
76 { "halt_wakeup", VCPU_STAT(halt_wakeup
) },
77 { "hypercalls", VCPU_STAT(hypercalls
) },
78 { "request_irq", VCPU_STAT(request_irq_exits
) },
79 { "irq_exits", VCPU_STAT(irq_exits
) },
80 { "host_state_reload", VCPU_STAT(host_state_reload
) },
81 { "efer_reload", VCPU_STAT(efer_reload
) },
82 { "fpu_reload", VCPU_STAT(fpu_reload
) },
83 { "insn_emulation", VCPU_STAT(insn_emulation
) },
84 { "insn_emulation_fail", VCPU_STAT(insn_emulation_fail
) },
85 { "mmu_shadow_zapped", VM_STAT(mmu_shadow_zapped
) },
86 { "mmu_pte_write", VM_STAT(mmu_pte_write
) },
87 { "mmu_pte_updated", VM_STAT(mmu_pte_updated
) },
88 { "mmu_pde_zapped", VM_STAT(mmu_pde_zapped
) },
89 { "mmu_flooded", VM_STAT(mmu_flooded
) },
90 { "mmu_recycled", VM_STAT(mmu_recycled
) },
91 { "mmu_cache_miss", VM_STAT(mmu_cache_miss
) },
92 { "remote_tlb_flush", VM_STAT(remote_tlb_flush
) },
93 { "largepages", VM_STAT(lpages
) },
98 unsigned long segment_base(u16 selector
)
100 struct descriptor_table gdt
;
101 struct desc_struct
*d
;
102 unsigned long table_base
;
108 asm("sgdt %0" : "=m"(gdt
));
109 table_base
= gdt
.base
;
111 if (selector
& 4) { /* from ldt */
114 asm("sldt %0" : "=g"(ldt_selector
));
115 table_base
= segment_base(ldt_selector
);
117 d
= (struct desc_struct
*)(table_base
+ (selector
& ~7));
118 v
= d
->base0
| ((unsigned long)d
->base1
<< 16) |
119 ((unsigned long)d
->base2
<< 24);
121 if (d
->s
== 0 && (d
->type
== 2 || d
->type
== 9 || d
->type
== 11))
122 v
|= ((unsigned long)((struct ldttss_desc64
*)d
)->base3
) << 32;
126 EXPORT_SYMBOL_GPL(segment_base
);
128 u64
kvm_get_apic_base(struct kvm_vcpu
*vcpu
)
130 if (irqchip_in_kernel(vcpu
->kvm
))
131 return vcpu
->arch
.apic_base
;
133 return vcpu
->arch
.apic_base
;
135 EXPORT_SYMBOL_GPL(kvm_get_apic_base
);
137 void kvm_set_apic_base(struct kvm_vcpu
*vcpu
, u64 data
)
139 /* TODO: reserve bits check */
140 if (irqchip_in_kernel(vcpu
->kvm
))
141 kvm_lapic_set_base(vcpu
, data
);
143 vcpu
->arch
.apic_base
= data
;
145 EXPORT_SYMBOL_GPL(kvm_set_apic_base
);
147 void kvm_queue_exception(struct kvm_vcpu
*vcpu
, unsigned nr
)
149 WARN_ON(vcpu
->arch
.exception
.pending
);
150 vcpu
->arch
.exception
.pending
= true;
151 vcpu
->arch
.exception
.has_error_code
= false;
152 vcpu
->arch
.exception
.nr
= nr
;
154 EXPORT_SYMBOL_GPL(kvm_queue_exception
);
156 void kvm_inject_page_fault(struct kvm_vcpu
*vcpu
, unsigned long addr
,
159 ++vcpu
->stat
.pf_guest
;
160 if (vcpu
->arch
.exception
.pending
) {
161 if (vcpu
->arch
.exception
.nr
== PF_VECTOR
) {
162 printk(KERN_DEBUG
"kvm: inject_page_fault:"
163 " double fault 0x%lx\n", addr
);
164 vcpu
->arch
.exception
.nr
= DF_VECTOR
;
165 vcpu
->arch
.exception
.error_code
= 0;
166 } else if (vcpu
->arch
.exception
.nr
== DF_VECTOR
) {
167 /* triple fault -> shutdown */
168 set_bit(KVM_REQ_TRIPLE_FAULT
, &vcpu
->requests
);
172 vcpu
->arch
.cr2
= addr
;
173 kvm_queue_exception_e(vcpu
, PF_VECTOR
, error_code
);
176 void kvm_queue_exception_e(struct kvm_vcpu
*vcpu
, unsigned nr
, u32 error_code
)
178 WARN_ON(vcpu
->arch
.exception
.pending
);
179 vcpu
->arch
.exception
.pending
= true;
180 vcpu
->arch
.exception
.has_error_code
= true;
181 vcpu
->arch
.exception
.nr
= nr
;
182 vcpu
->arch
.exception
.error_code
= error_code
;
184 EXPORT_SYMBOL_GPL(kvm_queue_exception_e
);
186 static void __queue_exception(struct kvm_vcpu
*vcpu
)
188 kvm_x86_ops
->queue_exception(vcpu
, vcpu
->arch
.exception
.nr
,
189 vcpu
->arch
.exception
.has_error_code
,
190 vcpu
->arch
.exception
.error_code
);
194 * Load the pae pdptrs. Return true is they are all valid.
196 int load_pdptrs(struct kvm_vcpu
*vcpu
, unsigned long cr3
)
198 gfn_t pdpt_gfn
= cr3
>> PAGE_SHIFT
;
199 unsigned offset
= ((cr3
& (PAGE_SIZE
-1)) >> 5) << 2;
202 u64 pdpte
[ARRAY_SIZE(vcpu
->arch
.pdptrs
)];
204 ret
= kvm_read_guest_page(vcpu
->kvm
, pdpt_gfn
, pdpte
,
205 offset
* sizeof(u64
), sizeof(pdpte
));
210 for (i
= 0; i
< ARRAY_SIZE(pdpte
); ++i
) {
211 if ((pdpte
[i
] & 1) && (pdpte
[i
] & 0xfffffff0000001e6ull
)) {
218 memcpy(vcpu
->arch
.pdptrs
, pdpte
, sizeof(vcpu
->arch
.pdptrs
));
223 EXPORT_SYMBOL_GPL(load_pdptrs
);
225 static bool pdptrs_changed(struct kvm_vcpu
*vcpu
)
227 u64 pdpte
[ARRAY_SIZE(vcpu
->arch
.pdptrs
)];
231 if (is_long_mode(vcpu
) || !is_pae(vcpu
))
234 r
= kvm_read_guest(vcpu
->kvm
, vcpu
->arch
.cr3
& ~31u, pdpte
, sizeof(pdpte
));
237 changed
= memcmp(pdpte
, vcpu
->arch
.pdptrs
, sizeof(pdpte
)) != 0;
243 void kvm_set_cr0(struct kvm_vcpu
*vcpu
, unsigned long cr0
)
245 if (cr0
& CR0_RESERVED_BITS
) {
246 printk(KERN_DEBUG
"set_cr0: 0x%lx #GP, reserved bits 0x%lx\n",
247 cr0
, vcpu
->arch
.cr0
);
248 kvm_inject_gp(vcpu
, 0);
252 if ((cr0
& X86_CR0_NW
) && !(cr0
& X86_CR0_CD
)) {
253 printk(KERN_DEBUG
"set_cr0: #GP, CD == 0 && NW == 1\n");
254 kvm_inject_gp(vcpu
, 0);
258 if ((cr0
& X86_CR0_PG
) && !(cr0
& X86_CR0_PE
)) {
259 printk(KERN_DEBUG
"set_cr0: #GP, set PG flag "
260 "and a clear PE flag\n");
261 kvm_inject_gp(vcpu
, 0);
265 if (!is_paging(vcpu
) && (cr0
& X86_CR0_PG
)) {
267 if ((vcpu
->arch
.shadow_efer
& EFER_LME
)) {
271 printk(KERN_DEBUG
"set_cr0: #GP, start paging "
272 "in long mode while PAE is disabled\n");
273 kvm_inject_gp(vcpu
, 0);
276 kvm_x86_ops
->get_cs_db_l_bits(vcpu
, &cs_db
, &cs_l
);
278 printk(KERN_DEBUG
"set_cr0: #GP, start paging "
279 "in long mode while CS.L == 1\n");
280 kvm_inject_gp(vcpu
, 0);
286 if (is_pae(vcpu
) && !load_pdptrs(vcpu
, vcpu
->arch
.cr3
)) {
287 printk(KERN_DEBUG
"set_cr0: #GP, pdptrs "
289 kvm_inject_gp(vcpu
, 0);
295 kvm_x86_ops
->set_cr0(vcpu
, cr0
);
296 vcpu
->arch
.cr0
= cr0
;
298 kvm_mmu_reset_context(vcpu
);
301 EXPORT_SYMBOL_GPL(kvm_set_cr0
);
303 void kvm_lmsw(struct kvm_vcpu
*vcpu
, unsigned long msw
)
305 kvm_set_cr0(vcpu
, (vcpu
->arch
.cr0
& ~0x0ful
) | (msw
& 0x0f));
306 KVMTRACE_1D(LMSW
, vcpu
,
307 (u32
)((vcpu
->arch
.cr0
& ~0x0ful
) | (msw
& 0x0f)),
310 EXPORT_SYMBOL_GPL(kvm_lmsw
);
312 void kvm_set_cr4(struct kvm_vcpu
*vcpu
, unsigned long cr4
)
314 if (cr4
& CR4_RESERVED_BITS
) {
315 printk(KERN_DEBUG
"set_cr4: #GP, reserved bits\n");
316 kvm_inject_gp(vcpu
, 0);
320 if (is_long_mode(vcpu
)) {
321 if (!(cr4
& X86_CR4_PAE
)) {
322 printk(KERN_DEBUG
"set_cr4: #GP, clearing PAE while "
324 kvm_inject_gp(vcpu
, 0);
327 } else if (is_paging(vcpu
) && !is_pae(vcpu
) && (cr4
& X86_CR4_PAE
)
328 && !load_pdptrs(vcpu
, vcpu
->arch
.cr3
)) {
329 printk(KERN_DEBUG
"set_cr4: #GP, pdptrs reserved bits\n");
330 kvm_inject_gp(vcpu
, 0);
334 if (cr4
& X86_CR4_VMXE
) {
335 printk(KERN_DEBUG
"set_cr4: #GP, setting VMXE\n");
336 kvm_inject_gp(vcpu
, 0);
339 kvm_x86_ops
->set_cr4(vcpu
, cr4
);
340 vcpu
->arch
.cr4
= cr4
;
341 kvm_mmu_reset_context(vcpu
);
343 EXPORT_SYMBOL_GPL(kvm_set_cr4
);
345 void kvm_set_cr3(struct kvm_vcpu
*vcpu
, unsigned long cr3
)
347 if (cr3
== vcpu
->arch
.cr3
&& !pdptrs_changed(vcpu
)) {
348 kvm_mmu_flush_tlb(vcpu
);
352 if (is_long_mode(vcpu
)) {
353 if (cr3
& CR3_L_MODE_RESERVED_BITS
) {
354 printk(KERN_DEBUG
"set_cr3: #GP, reserved bits\n");
355 kvm_inject_gp(vcpu
, 0);
360 if (cr3
& CR3_PAE_RESERVED_BITS
) {
362 "set_cr3: #GP, reserved bits\n");
363 kvm_inject_gp(vcpu
, 0);
366 if (is_paging(vcpu
) && !load_pdptrs(vcpu
, cr3
)) {
367 printk(KERN_DEBUG
"set_cr3: #GP, pdptrs "
369 kvm_inject_gp(vcpu
, 0);
374 * We don't check reserved bits in nonpae mode, because
375 * this isn't enforced, and VMware depends on this.
380 * Does the new cr3 value map to physical memory? (Note, we
381 * catch an invalid cr3 even in real-mode, because it would
382 * cause trouble later on when we turn on paging anyway.)
384 * A real CPU would silently accept an invalid cr3 and would
385 * attempt to use it - with largely undefined (and often hard
386 * to debug) behavior on the guest side.
388 if (unlikely(!gfn_to_memslot(vcpu
->kvm
, cr3
>> PAGE_SHIFT
)))
389 kvm_inject_gp(vcpu
, 0);
391 vcpu
->arch
.cr3
= cr3
;
392 vcpu
->arch
.mmu
.new_cr3(vcpu
);
395 EXPORT_SYMBOL_GPL(kvm_set_cr3
);
397 void kvm_set_cr8(struct kvm_vcpu
*vcpu
, unsigned long cr8
)
399 if (cr8
& CR8_RESERVED_BITS
) {
400 printk(KERN_DEBUG
"set_cr8: #GP, reserved bits 0x%lx\n", cr8
);
401 kvm_inject_gp(vcpu
, 0);
404 if (irqchip_in_kernel(vcpu
->kvm
))
405 kvm_lapic_set_tpr(vcpu
, cr8
);
407 vcpu
->arch
.cr8
= cr8
;
409 EXPORT_SYMBOL_GPL(kvm_set_cr8
);
411 unsigned long kvm_get_cr8(struct kvm_vcpu
*vcpu
)
413 if (irqchip_in_kernel(vcpu
->kvm
))
414 return kvm_lapic_get_cr8(vcpu
);
416 return vcpu
->arch
.cr8
;
418 EXPORT_SYMBOL_GPL(kvm_get_cr8
);
421 * List of msr numbers which we expose to userspace through KVM_GET_MSRS
422 * and KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST.
424 * This list is modified at module load time to reflect the
425 * capabilities of the host cpu.
427 static u32 msrs_to_save
[] = {
428 MSR_IA32_SYSENTER_CS
, MSR_IA32_SYSENTER_ESP
, MSR_IA32_SYSENTER_EIP
,
431 MSR_CSTAR
, MSR_KERNEL_GS_BASE
, MSR_SYSCALL_MASK
, MSR_LSTAR
,
433 MSR_IA32_TIME_STAMP_COUNTER
, MSR_KVM_SYSTEM_TIME
, MSR_KVM_WALL_CLOCK
,
434 MSR_IA32_PERF_STATUS
,
437 static unsigned num_msrs_to_save
;
439 static u32 emulated_msrs
[] = {
440 MSR_IA32_MISC_ENABLE
,
443 static void set_efer(struct kvm_vcpu
*vcpu
, u64 efer
)
445 if (efer
& efer_reserved_bits
) {
446 printk(KERN_DEBUG
"set_efer: 0x%llx #GP, reserved bits\n",
448 kvm_inject_gp(vcpu
, 0);
453 && (vcpu
->arch
.shadow_efer
& EFER_LME
) != (efer
& EFER_LME
)) {
454 printk(KERN_DEBUG
"set_efer: #GP, change LME while paging\n");
455 kvm_inject_gp(vcpu
, 0);
459 kvm_x86_ops
->set_efer(vcpu
, efer
);
462 efer
|= vcpu
->arch
.shadow_efer
& EFER_LMA
;
464 vcpu
->arch
.shadow_efer
= efer
;
467 void kvm_enable_efer_bits(u64 mask
)
469 efer_reserved_bits
&= ~mask
;
471 EXPORT_SYMBOL_GPL(kvm_enable_efer_bits
);
475 * Writes msr value into into the appropriate "register".
476 * Returns 0 on success, non-0 otherwise.
477 * Assumes vcpu_load() was already called.
479 int kvm_set_msr(struct kvm_vcpu
*vcpu
, u32 msr_index
, u64 data
)
481 return kvm_x86_ops
->set_msr(vcpu
, msr_index
, data
);
485 * Adapt set_msr() to msr_io()'s calling convention
487 static int do_set_msr(struct kvm_vcpu
*vcpu
, unsigned index
, u64
*data
)
489 return kvm_set_msr(vcpu
, index
, *data
);
492 static void kvm_write_wall_clock(struct kvm
*kvm
, gpa_t wall_clock
)
495 struct pvclock_wall_clock wc
;
496 struct timespec now
, sys
, boot
;
503 kvm_write_guest(kvm
, wall_clock
, &version
, sizeof(version
));
506 * The guest calculates current wall clock time by adding
507 * system time (updated by kvm_write_guest_time below) to the
508 * wall clock specified here. guest system time equals host
509 * system time for us, thus we must fill in host boot time here.
511 now
= current_kernel_time();
513 boot
= ns_to_timespec(timespec_to_ns(&now
) - timespec_to_ns(&sys
));
515 wc
.sec
= boot
.tv_sec
;
516 wc
.nsec
= boot
.tv_nsec
;
517 wc
.version
= version
;
519 kvm_write_guest(kvm
, wall_clock
, &wc
, sizeof(wc
));
522 kvm_write_guest(kvm
, wall_clock
, &version
, sizeof(version
));
525 static uint32_t div_frac(uint32_t dividend
, uint32_t divisor
)
527 uint32_t quotient
, remainder
;
529 /* Don't try to replace with do_div(), this one calculates
530 * "(dividend << 32) / divisor" */
532 : "=a" (quotient
), "=d" (remainder
)
533 : "0" (0), "1" (dividend
), "r" (divisor
) );
537 static void kvm_set_time_scale(uint32_t tsc_khz
, struct pvclock_vcpu_time_info
*hv_clock
)
539 uint64_t nsecs
= 1000000000LL;
544 tps64
= tsc_khz
* 1000LL;
545 while (tps64
> nsecs
*2) {
550 tps32
= (uint32_t)tps64
;
551 while (tps32
<= (uint32_t)nsecs
) {
556 hv_clock
->tsc_shift
= shift
;
557 hv_clock
->tsc_to_system_mul
= div_frac(nsecs
, tps32
);
559 pr_debug("%s: tsc_khz %u, tsc_shift %d, tsc_mul %u\n",
560 __FUNCTION__
, tsc_khz
, hv_clock
->tsc_shift
,
561 hv_clock
->tsc_to_system_mul
);
564 static void kvm_write_guest_time(struct kvm_vcpu
*v
)
568 struct kvm_vcpu_arch
*vcpu
= &v
->arch
;
571 if ((!vcpu
->time_page
))
574 if (unlikely(vcpu
->hv_clock_tsc_khz
!= tsc_khz
)) {
575 kvm_set_time_scale(tsc_khz
, &vcpu
->hv_clock
);
576 vcpu
->hv_clock_tsc_khz
= tsc_khz
;
579 /* Keep irq disabled to prevent changes to the clock */
580 local_irq_save(flags
);
581 kvm_get_msr(v
, MSR_IA32_TIME_STAMP_COUNTER
,
582 &vcpu
->hv_clock
.tsc_timestamp
);
584 local_irq_restore(flags
);
586 /* With all the info we got, fill in the values */
588 vcpu
->hv_clock
.system_time
= ts
.tv_nsec
+
589 (NSEC_PER_SEC
* (u64
)ts
.tv_sec
);
591 * The interface expects us to write an even number signaling that the
592 * update is finished. Since the guest won't see the intermediate
593 * state, we just increase by 2 at the end.
595 vcpu
->hv_clock
.version
+= 2;
597 shared_kaddr
= kmap_atomic(vcpu
->time_page
, KM_USER0
);
599 memcpy(shared_kaddr
+ vcpu
->time_offset
, &vcpu
->hv_clock
,
600 sizeof(vcpu
->hv_clock
));
602 kunmap_atomic(shared_kaddr
, KM_USER0
);
604 mark_page_dirty(v
->kvm
, vcpu
->time
>> PAGE_SHIFT
);
608 int kvm_set_msr_common(struct kvm_vcpu
*vcpu
, u32 msr
, u64 data
)
612 set_efer(vcpu
, data
);
614 case MSR_IA32_MC0_STATUS
:
615 pr_unimpl(vcpu
, "%s: MSR_IA32_MC0_STATUS 0x%llx, nop\n",
618 case MSR_IA32_MCG_STATUS
:
619 pr_unimpl(vcpu
, "%s: MSR_IA32_MCG_STATUS 0x%llx, nop\n",
622 case MSR_IA32_MCG_CTL
:
623 pr_unimpl(vcpu
, "%s: MSR_IA32_MCG_CTL 0x%llx, nop\n",
626 case MSR_IA32_UCODE_REV
:
627 case MSR_IA32_UCODE_WRITE
:
628 case 0x200 ... 0x2ff: /* MTRRs */
630 case MSR_IA32_APICBASE
:
631 kvm_set_apic_base(vcpu
, data
);
633 case MSR_IA32_MISC_ENABLE
:
634 vcpu
->arch
.ia32_misc_enable_msr
= data
;
636 case MSR_KVM_WALL_CLOCK
:
637 vcpu
->kvm
->arch
.wall_clock
= data
;
638 kvm_write_wall_clock(vcpu
->kvm
, data
);
640 case MSR_KVM_SYSTEM_TIME
: {
641 if (vcpu
->arch
.time_page
) {
642 kvm_release_page_dirty(vcpu
->arch
.time_page
);
643 vcpu
->arch
.time_page
= NULL
;
646 vcpu
->arch
.time
= data
;
648 /* we verify if the enable bit is set... */
652 /* ...but clean it before doing the actual write */
653 vcpu
->arch
.time_offset
= data
& ~(PAGE_MASK
| 1);
655 down_read(¤t
->mm
->mmap_sem
);
656 vcpu
->arch
.time_page
=
657 gfn_to_page(vcpu
->kvm
, data
>> PAGE_SHIFT
);
658 up_read(¤t
->mm
->mmap_sem
);
660 if (is_error_page(vcpu
->arch
.time_page
)) {
661 kvm_release_page_clean(vcpu
->arch
.time_page
);
662 vcpu
->arch
.time_page
= NULL
;
665 kvm_write_guest_time(vcpu
);
669 pr_unimpl(vcpu
, "unhandled wrmsr: 0x%x data %llx\n", msr
, data
);
674 EXPORT_SYMBOL_GPL(kvm_set_msr_common
);
678 * Reads an msr value (of 'msr_index') into 'pdata'.
679 * Returns 0 on success, non-0 otherwise.
680 * Assumes vcpu_load() was already called.
682 int kvm_get_msr(struct kvm_vcpu
*vcpu
, u32 msr_index
, u64
*pdata
)
684 return kvm_x86_ops
->get_msr(vcpu
, msr_index
, pdata
);
687 int kvm_get_msr_common(struct kvm_vcpu
*vcpu
, u32 msr
, u64
*pdata
)
692 case 0xc0010010: /* SYSCFG */
693 case 0xc0010015: /* HWCR */
694 case MSR_IA32_PLATFORM_ID
:
695 case MSR_IA32_P5_MC_ADDR
:
696 case MSR_IA32_P5_MC_TYPE
:
697 case MSR_IA32_MC0_CTL
:
698 case MSR_IA32_MCG_STATUS
:
699 case MSR_IA32_MCG_CAP
:
700 case MSR_IA32_MCG_CTL
:
701 case MSR_IA32_MC0_MISC
:
702 case MSR_IA32_MC0_MISC
+4:
703 case MSR_IA32_MC0_MISC
+8:
704 case MSR_IA32_MC0_MISC
+12:
705 case MSR_IA32_MC0_MISC
+16:
706 case MSR_IA32_UCODE_REV
:
707 case MSR_IA32_EBL_CR_POWERON
:
710 case 0x200 ... 0x2ff:
713 case 0xcd: /* fsb frequency */
716 case MSR_IA32_APICBASE
:
717 data
= kvm_get_apic_base(vcpu
);
719 case MSR_IA32_MISC_ENABLE
:
720 data
= vcpu
->arch
.ia32_misc_enable_msr
;
722 case MSR_IA32_PERF_STATUS
:
723 /* TSC increment by tick */
726 data
|= (((uint64_t)4ULL) << 40);
729 data
= vcpu
->arch
.shadow_efer
;
731 case MSR_KVM_WALL_CLOCK
:
732 data
= vcpu
->kvm
->arch
.wall_clock
;
734 case MSR_KVM_SYSTEM_TIME
:
735 data
= vcpu
->arch
.time
;
738 pr_unimpl(vcpu
, "unhandled rdmsr: 0x%x\n", msr
);
744 EXPORT_SYMBOL_GPL(kvm_get_msr_common
);
747 * Read or write a bunch of msrs. All parameters are kernel addresses.
749 * @return number of msrs set successfully.
751 static int __msr_io(struct kvm_vcpu
*vcpu
, struct kvm_msrs
*msrs
,
752 struct kvm_msr_entry
*entries
,
753 int (*do_msr
)(struct kvm_vcpu
*vcpu
,
754 unsigned index
, u64
*data
))
760 down_read(&vcpu
->kvm
->slots_lock
);
761 for (i
= 0; i
< msrs
->nmsrs
; ++i
)
762 if (do_msr(vcpu
, entries
[i
].index
, &entries
[i
].data
))
764 up_read(&vcpu
->kvm
->slots_lock
);
772 * Read or write a bunch of msrs. Parameters are user addresses.
774 * @return number of msrs set successfully.
776 static int msr_io(struct kvm_vcpu
*vcpu
, struct kvm_msrs __user
*user_msrs
,
777 int (*do_msr
)(struct kvm_vcpu
*vcpu
,
778 unsigned index
, u64
*data
),
781 struct kvm_msrs msrs
;
782 struct kvm_msr_entry
*entries
;
787 if (copy_from_user(&msrs
, user_msrs
, sizeof msrs
))
791 if (msrs
.nmsrs
>= MAX_IO_MSRS
)
795 size
= sizeof(struct kvm_msr_entry
) * msrs
.nmsrs
;
796 entries
= vmalloc(size
);
801 if (copy_from_user(entries
, user_msrs
->entries
, size
))
804 r
= n
= __msr_io(vcpu
, &msrs
, entries
, do_msr
);
809 if (writeback
&& copy_to_user(user_msrs
->entries
, entries
, size
))
821 * Make sure that a cpu that is being hot-unplugged does not have any vcpus
824 void decache_vcpus_on_cpu(int cpu
)
827 struct kvm_vcpu
*vcpu
;
830 spin_lock(&kvm_lock
);
831 list_for_each_entry(vm
, &vm_list
, vm_list
)
832 for (i
= 0; i
< KVM_MAX_VCPUS
; ++i
) {
837 * If the vcpu is locked, then it is running on some
838 * other cpu and therefore it is not cached on the
841 * If it's not locked, check the last cpu it executed
844 if (mutex_trylock(&vcpu
->mutex
)) {
845 if (vcpu
->cpu
== cpu
) {
846 kvm_x86_ops
->vcpu_decache(vcpu
);
849 mutex_unlock(&vcpu
->mutex
);
852 spin_unlock(&kvm_lock
);
855 int kvm_dev_ioctl_check_extension(long ext
)
860 case KVM_CAP_IRQCHIP
:
862 case KVM_CAP_MMU_SHADOW_CACHE_CONTROL
:
863 case KVM_CAP_USER_MEMORY
:
864 case KVM_CAP_SET_TSS_ADDR
:
865 case KVM_CAP_EXT_CPUID
:
866 case KVM_CAP_CLOCKSOURCE
:
868 case KVM_CAP_NOP_IO_DELAY
:
869 case KVM_CAP_MP_STATE
:
873 r
= !kvm_x86_ops
->cpu_has_accelerated_tpr();
875 case KVM_CAP_NR_VCPUS
:
878 case KVM_CAP_NR_MEMSLOTS
:
879 r
= KVM_MEMORY_SLOTS
;
892 long kvm_arch_dev_ioctl(struct file
*filp
,
893 unsigned int ioctl
, unsigned long arg
)
895 void __user
*argp
= (void __user
*)arg
;
899 case KVM_GET_MSR_INDEX_LIST
: {
900 struct kvm_msr_list __user
*user_msr_list
= argp
;
901 struct kvm_msr_list msr_list
;
905 if (copy_from_user(&msr_list
, user_msr_list
, sizeof msr_list
))
908 msr_list
.nmsrs
= num_msrs_to_save
+ ARRAY_SIZE(emulated_msrs
);
909 if (copy_to_user(user_msr_list
, &msr_list
, sizeof msr_list
))
912 if (n
< num_msrs_to_save
)
915 if (copy_to_user(user_msr_list
->indices
, &msrs_to_save
,
916 num_msrs_to_save
* sizeof(u32
)))
918 if (copy_to_user(user_msr_list
->indices
919 + num_msrs_to_save
* sizeof(u32
),
921 ARRAY_SIZE(emulated_msrs
) * sizeof(u32
)))
926 case KVM_GET_SUPPORTED_CPUID
: {
927 struct kvm_cpuid2 __user
*cpuid_arg
= argp
;
928 struct kvm_cpuid2 cpuid
;
931 if (copy_from_user(&cpuid
, cpuid_arg
, sizeof cpuid
))
933 r
= kvm_dev_ioctl_get_supported_cpuid(&cpuid
,
939 if (copy_to_user(cpuid_arg
, &cpuid
, sizeof cpuid
))
951 void kvm_arch_vcpu_load(struct kvm_vcpu
*vcpu
, int cpu
)
953 kvm_x86_ops
->vcpu_load(vcpu
, cpu
);
954 kvm_write_guest_time(vcpu
);
957 void kvm_arch_vcpu_put(struct kvm_vcpu
*vcpu
)
959 kvm_x86_ops
->vcpu_put(vcpu
);
960 kvm_put_guest_fpu(vcpu
);
963 static int is_efer_nx(void)
967 rdmsrl(MSR_EFER
, efer
);
968 return efer
& EFER_NX
;
971 static void cpuid_fix_nx_cap(struct kvm_vcpu
*vcpu
)
974 struct kvm_cpuid_entry2
*e
, *entry
;
977 for (i
= 0; i
< vcpu
->arch
.cpuid_nent
; ++i
) {
978 e
= &vcpu
->arch
.cpuid_entries
[i
];
979 if (e
->function
== 0x80000001) {
984 if (entry
&& (entry
->edx
& (1 << 20)) && !is_efer_nx()) {
985 entry
->edx
&= ~(1 << 20);
986 printk(KERN_INFO
"kvm: guest NX capability removed\n");
990 /* when an old userspace process fills a new kernel module */
991 static int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu
*vcpu
,
992 struct kvm_cpuid
*cpuid
,
993 struct kvm_cpuid_entry __user
*entries
)
996 struct kvm_cpuid_entry
*cpuid_entries
;
999 if (cpuid
->nent
> KVM_MAX_CPUID_ENTRIES
)
1002 cpuid_entries
= vmalloc(sizeof(struct kvm_cpuid_entry
) * cpuid
->nent
);
1006 if (copy_from_user(cpuid_entries
, entries
,
1007 cpuid
->nent
* sizeof(struct kvm_cpuid_entry
)))
1009 for (i
= 0; i
< cpuid
->nent
; i
++) {
1010 vcpu
->arch
.cpuid_entries
[i
].function
= cpuid_entries
[i
].function
;
1011 vcpu
->arch
.cpuid_entries
[i
].eax
= cpuid_entries
[i
].eax
;
1012 vcpu
->arch
.cpuid_entries
[i
].ebx
= cpuid_entries
[i
].ebx
;
1013 vcpu
->arch
.cpuid_entries
[i
].ecx
= cpuid_entries
[i
].ecx
;
1014 vcpu
->arch
.cpuid_entries
[i
].edx
= cpuid_entries
[i
].edx
;
1015 vcpu
->arch
.cpuid_entries
[i
].index
= 0;
1016 vcpu
->arch
.cpuid_entries
[i
].flags
= 0;
1017 vcpu
->arch
.cpuid_entries
[i
].padding
[0] = 0;
1018 vcpu
->arch
.cpuid_entries
[i
].padding
[1] = 0;
1019 vcpu
->arch
.cpuid_entries
[i
].padding
[2] = 0;
1021 vcpu
->arch
.cpuid_nent
= cpuid
->nent
;
1022 cpuid_fix_nx_cap(vcpu
);
1026 vfree(cpuid_entries
);
1031 static int kvm_vcpu_ioctl_set_cpuid2(struct kvm_vcpu
*vcpu
,
1032 struct kvm_cpuid2
*cpuid
,
1033 struct kvm_cpuid_entry2 __user
*entries
)
1038 if (cpuid
->nent
> KVM_MAX_CPUID_ENTRIES
)
1041 if (copy_from_user(&vcpu
->arch
.cpuid_entries
, entries
,
1042 cpuid
->nent
* sizeof(struct kvm_cpuid_entry2
)))
1044 vcpu
->arch
.cpuid_nent
= cpuid
->nent
;
1051 static int kvm_vcpu_ioctl_get_cpuid2(struct kvm_vcpu
*vcpu
,
1052 struct kvm_cpuid2
*cpuid
,
1053 struct kvm_cpuid_entry2 __user
*entries
)
1058 if (cpuid
->nent
< vcpu
->arch
.cpuid_nent
)
1061 if (copy_to_user(entries
, &vcpu
->arch
.cpuid_entries
,
1062 vcpu
->arch
.cpuid_nent
* sizeof(struct kvm_cpuid_entry2
)))
1067 cpuid
->nent
= vcpu
->arch
.cpuid_nent
;
1071 static inline u32
bit(int bitno
)
1073 return 1 << (bitno
& 31);
1076 static void do_cpuid_1_ent(struct kvm_cpuid_entry2
*entry
, u32 function
,
1079 entry
->function
= function
;
1080 entry
->index
= index
;
1081 cpuid_count(entry
->function
, entry
->index
,
1082 &entry
->eax
, &entry
->ebx
, &entry
->ecx
, &entry
->edx
);
1086 static void do_cpuid_ent(struct kvm_cpuid_entry2
*entry
, u32 function
,
1087 u32 index
, int *nent
, int maxnent
)
1089 const u32 kvm_supported_word0_x86_features
= bit(X86_FEATURE_FPU
) |
1090 bit(X86_FEATURE_VME
) | bit(X86_FEATURE_DE
) |
1091 bit(X86_FEATURE_PSE
) | bit(X86_FEATURE_TSC
) |
1092 bit(X86_FEATURE_MSR
) | bit(X86_FEATURE_PAE
) |
1093 bit(X86_FEATURE_CX8
) | bit(X86_FEATURE_APIC
) |
1094 bit(X86_FEATURE_SEP
) | bit(X86_FEATURE_PGE
) |
1095 bit(X86_FEATURE_CMOV
) | bit(X86_FEATURE_PSE36
) |
1096 bit(X86_FEATURE_CLFLSH
) | bit(X86_FEATURE_MMX
) |
1097 bit(X86_FEATURE_FXSR
) | bit(X86_FEATURE_XMM
) |
1098 bit(X86_FEATURE_XMM2
) | bit(X86_FEATURE_SELFSNOOP
);
1099 const u32 kvm_supported_word1_x86_features
= bit(X86_FEATURE_FPU
) |
1100 bit(X86_FEATURE_VME
) | bit(X86_FEATURE_DE
) |
1101 bit(X86_FEATURE_PSE
) | bit(X86_FEATURE_TSC
) |
1102 bit(X86_FEATURE_MSR
) | bit(X86_FEATURE_PAE
) |
1103 bit(X86_FEATURE_CX8
) | bit(X86_FEATURE_APIC
) |
1104 bit(X86_FEATURE_PGE
) |
1105 bit(X86_FEATURE_CMOV
) | bit(X86_FEATURE_PSE36
) |
1106 bit(X86_FEATURE_MMX
) | bit(X86_FEATURE_FXSR
) |
1107 bit(X86_FEATURE_SYSCALL
) |
1108 (bit(X86_FEATURE_NX
) && is_efer_nx()) |
1109 #ifdef CONFIG_X86_64
1110 bit(X86_FEATURE_LM
) |
1112 bit(X86_FEATURE_MMXEXT
) |
1113 bit(X86_FEATURE_3DNOWEXT
) |
1114 bit(X86_FEATURE_3DNOW
);
1115 const u32 kvm_supported_word3_x86_features
=
1116 bit(X86_FEATURE_XMM3
) | bit(X86_FEATURE_CX16
);
1117 const u32 kvm_supported_word6_x86_features
=
1118 bit(X86_FEATURE_LAHF_LM
) | bit(X86_FEATURE_CMP_LEGACY
);
1120 /* all func 2 cpuid_count() should be called on the same cpu */
1122 do_cpuid_1_ent(entry
, function
, index
);
1127 entry
->eax
= min(entry
->eax
, (u32
)0xb);
1130 entry
->edx
&= kvm_supported_word0_x86_features
;
1131 entry
->ecx
&= kvm_supported_word3_x86_features
;
1133 /* function 2 entries are STATEFUL. That is, repeated cpuid commands
1134 * may return different values. This forces us to get_cpu() before
1135 * issuing the first command, and also to emulate this annoying behavior
1136 * in kvm_emulate_cpuid() using KVM_CPUID_FLAG_STATE_READ_NEXT */
1138 int t
, times
= entry
->eax
& 0xff;
1140 entry
->flags
|= KVM_CPUID_FLAG_STATEFUL_FUNC
;
1141 for (t
= 1; t
< times
&& *nent
< maxnent
; ++t
) {
1142 do_cpuid_1_ent(&entry
[t
], function
, 0);
1143 entry
[t
].flags
|= KVM_CPUID_FLAG_STATEFUL_FUNC
;
1148 /* function 4 and 0xb have additional index. */
1152 entry
->flags
|= KVM_CPUID_FLAG_SIGNIFCANT_INDEX
;
1153 /* read more entries until cache_type is zero */
1154 for (i
= 1; *nent
< maxnent
; ++i
) {
1155 cache_type
= entry
[i
- 1].eax
& 0x1f;
1158 do_cpuid_1_ent(&entry
[i
], function
, i
);
1160 KVM_CPUID_FLAG_SIGNIFCANT_INDEX
;
1168 entry
->flags
|= KVM_CPUID_FLAG_SIGNIFCANT_INDEX
;
1169 /* read more entries until level_type is zero */
1170 for (i
= 1; *nent
< maxnent
; ++i
) {
1171 level_type
= entry
[i
- 1].ecx
& 0xff;
1174 do_cpuid_1_ent(&entry
[i
], function
, i
);
1176 KVM_CPUID_FLAG_SIGNIFCANT_INDEX
;
1182 entry
->eax
= min(entry
->eax
, 0x8000001a);
1185 entry
->edx
&= kvm_supported_word1_x86_features
;
1186 entry
->ecx
&= kvm_supported_word6_x86_features
;
1192 static int kvm_dev_ioctl_get_supported_cpuid(struct kvm_cpuid2
*cpuid
,
1193 struct kvm_cpuid_entry2 __user
*entries
)
1195 struct kvm_cpuid_entry2
*cpuid_entries
;
1196 int limit
, nent
= 0, r
= -E2BIG
;
1199 if (cpuid
->nent
< 1)
1202 cpuid_entries
= vmalloc(sizeof(struct kvm_cpuid_entry2
) * cpuid
->nent
);
1206 do_cpuid_ent(&cpuid_entries
[0], 0, 0, &nent
, cpuid
->nent
);
1207 limit
= cpuid_entries
[0].eax
;
1208 for (func
= 1; func
<= limit
&& nent
< cpuid
->nent
; ++func
)
1209 do_cpuid_ent(&cpuid_entries
[nent
], func
, 0,
1210 &nent
, cpuid
->nent
);
1212 if (nent
>= cpuid
->nent
)
1215 do_cpuid_ent(&cpuid_entries
[nent
], 0x80000000, 0, &nent
, cpuid
->nent
);
1216 limit
= cpuid_entries
[nent
- 1].eax
;
1217 for (func
= 0x80000001; func
<= limit
&& nent
< cpuid
->nent
; ++func
)
1218 do_cpuid_ent(&cpuid_entries
[nent
], func
, 0,
1219 &nent
, cpuid
->nent
);
1221 if (copy_to_user(entries
, cpuid_entries
,
1222 nent
* sizeof(struct kvm_cpuid_entry2
)))
1228 vfree(cpuid_entries
);
1233 static int kvm_vcpu_ioctl_get_lapic(struct kvm_vcpu
*vcpu
,
1234 struct kvm_lapic_state
*s
)
1237 memcpy(s
->regs
, vcpu
->arch
.apic
->regs
, sizeof *s
);
1243 static int kvm_vcpu_ioctl_set_lapic(struct kvm_vcpu
*vcpu
,
1244 struct kvm_lapic_state
*s
)
1247 memcpy(vcpu
->arch
.apic
->regs
, s
->regs
, sizeof *s
);
1248 kvm_apic_post_state_restore(vcpu
);
1254 static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu
*vcpu
,
1255 struct kvm_interrupt
*irq
)
1257 if (irq
->irq
< 0 || irq
->irq
>= 256)
1259 if (irqchip_in_kernel(vcpu
->kvm
))
1263 set_bit(irq
->irq
, vcpu
->arch
.irq_pending
);
1264 set_bit(irq
->irq
/ BITS_PER_LONG
, &vcpu
->arch
.irq_summary
);
1271 static int vcpu_ioctl_tpr_access_reporting(struct kvm_vcpu
*vcpu
,
1272 struct kvm_tpr_access_ctl
*tac
)
1276 vcpu
->arch
.tpr_access_reporting
= !!tac
->enabled
;
1280 long kvm_arch_vcpu_ioctl(struct file
*filp
,
1281 unsigned int ioctl
, unsigned long arg
)
1283 struct kvm_vcpu
*vcpu
= filp
->private_data
;
1284 void __user
*argp
= (void __user
*)arg
;
1288 case KVM_GET_LAPIC
: {
1289 struct kvm_lapic_state lapic
;
1291 memset(&lapic
, 0, sizeof lapic
);
1292 r
= kvm_vcpu_ioctl_get_lapic(vcpu
, &lapic
);
1296 if (copy_to_user(argp
, &lapic
, sizeof lapic
))
1301 case KVM_SET_LAPIC
: {
1302 struct kvm_lapic_state lapic
;
1305 if (copy_from_user(&lapic
, argp
, sizeof lapic
))
1307 r
= kvm_vcpu_ioctl_set_lapic(vcpu
, &lapic
);;
1313 case KVM_INTERRUPT
: {
1314 struct kvm_interrupt irq
;
1317 if (copy_from_user(&irq
, argp
, sizeof irq
))
1319 r
= kvm_vcpu_ioctl_interrupt(vcpu
, &irq
);
1325 case KVM_SET_CPUID
: {
1326 struct kvm_cpuid __user
*cpuid_arg
= argp
;
1327 struct kvm_cpuid cpuid
;
1330 if (copy_from_user(&cpuid
, cpuid_arg
, sizeof cpuid
))
1332 r
= kvm_vcpu_ioctl_set_cpuid(vcpu
, &cpuid
, cpuid_arg
->entries
);
1337 case KVM_SET_CPUID2
: {
1338 struct kvm_cpuid2 __user
*cpuid_arg
= argp
;
1339 struct kvm_cpuid2 cpuid
;
1342 if (copy_from_user(&cpuid
, cpuid_arg
, sizeof cpuid
))
1344 r
= kvm_vcpu_ioctl_set_cpuid2(vcpu
, &cpuid
,
1345 cpuid_arg
->entries
);
1350 case KVM_GET_CPUID2
: {
1351 struct kvm_cpuid2 __user
*cpuid_arg
= argp
;
1352 struct kvm_cpuid2 cpuid
;
1355 if (copy_from_user(&cpuid
, cpuid_arg
, sizeof cpuid
))
1357 r
= kvm_vcpu_ioctl_get_cpuid2(vcpu
, &cpuid
,
1358 cpuid_arg
->entries
);
1362 if (copy_to_user(cpuid_arg
, &cpuid
, sizeof cpuid
))
1368 r
= msr_io(vcpu
, argp
, kvm_get_msr
, 1);
1371 r
= msr_io(vcpu
, argp
, do_set_msr
, 0);
1373 case KVM_TPR_ACCESS_REPORTING
: {
1374 struct kvm_tpr_access_ctl tac
;
1377 if (copy_from_user(&tac
, argp
, sizeof tac
))
1379 r
= vcpu_ioctl_tpr_access_reporting(vcpu
, &tac
);
1383 if (copy_to_user(argp
, &tac
, sizeof tac
))
1388 case KVM_SET_VAPIC_ADDR
: {
1389 struct kvm_vapic_addr va
;
1392 if (!irqchip_in_kernel(vcpu
->kvm
))
1395 if (copy_from_user(&va
, argp
, sizeof va
))
1398 kvm_lapic_set_vapic_addr(vcpu
, va
.vapic_addr
);
1408 static int kvm_vm_ioctl_set_tss_addr(struct kvm
*kvm
, unsigned long addr
)
1412 if (addr
> (unsigned int)(-3 * PAGE_SIZE
))
1414 ret
= kvm_x86_ops
->set_tss_addr(kvm
, addr
);
1418 static int kvm_vm_ioctl_set_nr_mmu_pages(struct kvm
*kvm
,
1419 u32 kvm_nr_mmu_pages
)
1421 if (kvm_nr_mmu_pages
< KVM_MIN_ALLOC_MMU_PAGES
)
1424 down_write(&kvm
->slots_lock
);
1426 kvm_mmu_change_mmu_pages(kvm
, kvm_nr_mmu_pages
);
1427 kvm
->arch
.n_requested_mmu_pages
= kvm_nr_mmu_pages
;
1429 up_write(&kvm
->slots_lock
);
1433 static int kvm_vm_ioctl_get_nr_mmu_pages(struct kvm
*kvm
)
1435 return kvm
->arch
.n_alloc_mmu_pages
;
1438 gfn_t
unalias_gfn(struct kvm
*kvm
, gfn_t gfn
)
1441 struct kvm_mem_alias
*alias
;
1443 for (i
= 0; i
< kvm
->arch
.naliases
; ++i
) {
1444 alias
= &kvm
->arch
.aliases
[i
];
1445 if (gfn
>= alias
->base_gfn
1446 && gfn
< alias
->base_gfn
+ alias
->npages
)
1447 return alias
->target_gfn
+ gfn
- alias
->base_gfn
;
1453 * Set a new alias region. Aliases map a portion of physical memory into
1454 * another portion. This is useful for memory windows, for example the PC
1457 static int kvm_vm_ioctl_set_memory_alias(struct kvm
*kvm
,
1458 struct kvm_memory_alias
*alias
)
1461 struct kvm_mem_alias
*p
;
1464 /* General sanity checks */
1465 if (alias
->memory_size
& (PAGE_SIZE
- 1))
1467 if (alias
->guest_phys_addr
& (PAGE_SIZE
- 1))
1469 if (alias
->slot
>= KVM_ALIAS_SLOTS
)
1471 if (alias
->guest_phys_addr
+ alias
->memory_size
1472 < alias
->guest_phys_addr
)
1474 if (alias
->target_phys_addr
+ alias
->memory_size
1475 < alias
->target_phys_addr
)
1478 down_write(&kvm
->slots_lock
);
1480 p
= &kvm
->arch
.aliases
[alias
->slot
];
1481 p
->base_gfn
= alias
->guest_phys_addr
>> PAGE_SHIFT
;
1482 p
->npages
= alias
->memory_size
>> PAGE_SHIFT
;
1483 p
->target_gfn
= alias
->target_phys_addr
>> PAGE_SHIFT
;
1485 for (n
= KVM_ALIAS_SLOTS
; n
> 0; --n
)
1486 if (kvm
->arch
.aliases
[n
- 1].npages
)
1488 kvm
->arch
.naliases
= n
;
1490 kvm_mmu_zap_all(kvm
);
1492 up_write(&kvm
->slots_lock
);
1500 static int kvm_vm_ioctl_get_irqchip(struct kvm
*kvm
, struct kvm_irqchip
*chip
)
1505 switch (chip
->chip_id
) {
1506 case KVM_IRQCHIP_PIC_MASTER
:
1507 memcpy(&chip
->chip
.pic
,
1508 &pic_irqchip(kvm
)->pics
[0],
1509 sizeof(struct kvm_pic_state
));
1511 case KVM_IRQCHIP_PIC_SLAVE
:
1512 memcpy(&chip
->chip
.pic
,
1513 &pic_irqchip(kvm
)->pics
[1],
1514 sizeof(struct kvm_pic_state
));
1516 case KVM_IRQCHIP_IOAPIC
:
1517 memcpy(&chip
->chip
.ioapic
,
1518 ioapic_irqchip(kvm
),
1519 sizeof(struct kvm_ioapic_state
));
1528 static int kvm_vm_ioctl_set_irqchip(struct kvm
*kvm
, struct kvm_irqchip
*chip
)
1533 switch (chip
->chip_id
) {
1534 case KVM_IRQCHIP_PIC_MASTER
:
1535 memcpy(&pic_irqchip(kvm
)->pics
[0],
1537 sizeof(struct kvm_pic_state
));
1539 case KVM_IRQCHIP_PIC_SLAVE
:
1540 memcpy(&pic_irqchip(kvm
)->pics
[1],
1542 sizeof(struct kvm_pic_state
));
1544 case KVM_IRQCHIP_IOAPIC
:
1545 memcpy(ioapic_irqchip(kvm
),
1547 sizeof(struct kvm_ioapic_state
));
1553 kvm_pic_update_irq(pic_irqchip(kvm
));
1557 static int kvm_vm_ioctl_get_pit(struct kvm
*kvm
, struct kvm_pit_state
*ps
)
1561 memcpy(ps
, &kvm
->arch
.vpit
->pit_state
, sizeof(struct kvm_pit_state
));
1565 static int kvm_vm_ioctl_set_pit(struct kvm
*kvm
, struct kvm_pit_state
*ps
)
1569 memcpy(&kvm
->arch
.vpit
->pit_state
, ps
, sizeof(struct kvm_pit_state
));
1570 kvm_pit_load_count(kvm
, 0, ps
->channels
[0].count
);
1575 * Get (and clear) the dirty memory log for a memory slot.
1577 int kvm_vm_ioctl_get_dirty_log(struct kvm
*kvm
,
1578 struct kvm_dirty_log
*log
)
1582 struct kvm_memory_slot
*memslot
;
1585 down_write(&kvm
->slots_lock
);
1587 r
= kvm_get_dirty_log(kvm
, log
, &is_dirty
);
1591 /* If nothing is dirty, don't bother messing with page tables. */
1593 kvm_mmu_slot_remove_write_access(kvm
, log
->slot
);
1594 kvm_flush_remote_tlbs(kvm
);
1595 memslot
= &kvm
->memslots
[log
->slot
];
1596 n
= ALIGN(memslot
->npages
, BITS_PER_LONG
) / 8;
1597 memset(memslot
->dirty_bitmap
, 0, n
);
1601 up_write(&kvm
->slots_lock
);
1605 long kvm_arch_vm_ioctl(struct file
*filp
,
1606 unsigned int ioctl
, unsigned long arg
)
1608 struct kvm
*kvm
= filp
->private_data
;
1609 void __user
*argp
= (void __user
*)arg
;
1613 case KVM_SET_TSS_ADDR
:
1614 r
= kvm_vm_ioctl_set_tss_addr(kvm
, arg
);
1618 case KVM_SET_MEMORY_REGION
: {
1619 struct kvm_memory_region kvm_mem
;
1620 struct kvm_userspace_memory_region kvm_userspace_mem
;
1623 if (copy_from_user(&kvm_mem
, argp
, sizeof kvm_mem
))
1625 kvm_userspace_mem
.slot
= kvm_mem
.slot
;
1626 kvm_userspace_mem
.flags
= kvm_mem
.flags
;
1627 kvm_userspace_mem
.guest_phys_addr
= kvm_mem
.guest_phys_addr
;
1628 kvm_userspace_mem
.memory_size
= kvm_mem
.memory_size
;
1629 r
= kvm_vm_ioctl_set_memory_region(kvm
, &kvm_userspace_mem
, 0);
1634 case KVM_SET_NR_MMU_PAGES
:
1635 r
= kvm_vm_ioctl_set_nr_mmu_pages(kvm
, arg
);
1639 case KVM_GET_NR_MMU_PAGES
:
1640 r
= kvm_vm_ioctl_get_nr_mmu_pages(kvm
);
1642 case KVM_SET_MEMORY_ALIAS
: {
1643 struct kvm_memory_alias alias
;
1646 if (copy_from_user(&alias
, argp
, sizeof alias
))
1648 r
= kvm_vm_ioctl_set_memory_alias(kvm
, &alias
);
1653 case KVM_CREATE_IRQCHIP
:
1655 kvm
->arch
.vpic
= kvm_create_pic(kvm
);
1656 if (kvm
->arch
.vpic
) {
1657 r
= kvm_ioapic_init(kvm
);
1659 kfree(kvm
->arch
.vpic
);
1660 kvm
->arch
.vpic
= NULL
;
1666 case KVM_CREATE_PIT
:
1668 kvm
->arch
.vpit
= kvm_create_pit(kvm
);
1672 case KVM_IRQ_LINE
: {
1673 struct kvm_irq_level irq_event
;
1676 if (copy_from_user(&irq_event
, argp
, sizeof irq_event
))
1678 if (irqchip_in_kernel(kvm
)) {
1679 mutex_lock(&kvm
->lock
);
1680 if (irq_event
.irq
< 16)
1681 kvm_pic_set_irq(pic_irqchip(kvm
),
1684 kvm_ioapic_set_irq(kvm
->arch
.vioapic
,
1687 mutex_unlock(&kvm
->lock
);
1692 case KVM_GET_IRQCHIP
: {
1693 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
1694 struct kvm_irqchip chip
;
1697 if (copy_from_user(&chip
, argp
, sizeof chip
))
1700 if (!irqchip_in_kernel(kvm
))
1702 r
= kvm_vm_ioctl_get_irqchip(kvm
, &chip
);
1706 if (copy_to_user(argp
, &chip
, sizeof chip
))
1711 case KVM_SET_IRQCHIP
: {
1712 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
1713 struct kvm_irqchip chip
;
1716 if (copy_from_user(&chip
, argp
, sizeof chip
))
1719 if (!irqchip_in_kernel(kvm
))
1721 r
= kvm_vm_ioctl_set_irqchip(kvm
, &chip
);
1728 struct kvm_pit_state ps
;
1730 if (copy_from_user(&ps
, argp
, sizeof ps
))
1733 if (!kvm
->arch
.vpit
)
1735 r
= kvm_vm_ioctl_get_pit(kvm
, &ps
);
1739 if (copy_to_user(argp
, &ps
, sizeof ps
))
1745 struct kvm_pit_state ps
;
1747 if (copy_from_user(&ps
, argp
, sizeof ps
))
1750 if (!kvm
->arch
.vpit
)
1752 r
= kvm_vm_ioctl_set_pit(kvm
, &ps
);
1765 static void kvm_init_msr_list(void)
1770 for (i
= j
= 0; i
< ARRAY_SIZE(msrs_to_save
); i
++) {
1771 if (rdmsr_safe(msrs_to_save
[i
], &dummy
[0], &dummy
[1]) < 0)
1774 msrs_to_save
[j
] = msrs_to_save
[i
];
1777 num_msrs_to_save
= j
;
1781 * Only apic need an MMIO device hook, so shortcut now..
1783 static struct kvm_io_device
*vcpu_find_pervcpu_dev(struct kvm_vcpu
*vcpu
,
1786 struct kvm_io_device
*dev
;
1788 if (vcpu
->arch
.apic
) {
1789 dev
= &vcpu
->arch
.apic
->dev
;
1790 if (dev
->in_range(dev
, addr
))
1797 static struct kvm_io_device
*vcpu_find_mmio_dev(struct kvm_vcpu
*vcpu
,
1800 struct kvm_io_device
*dev
;
1802 dev
= vcpu_find_pervcpu_dev(vcpu
, addr
);
1804 dev
= kvm_io_bus_find_dev(&vcpu
->kvm
->mmio_bus
, addr
);
1808 int emulator_read_std(unsigned long addr
,
1811 struct kvm_vcpu
*vcpu
)
1814 int r
= X86EMUL_CONTINUE
;
1817 gpa_t gpa
= vcpu
->arch
.mmu
.gva_to_gpa(vcpu
, addr
);
1818 unsigned offset
= addr
& (PAGE_SIZE
-1);
1819 unsigned tocopy
= min(bytes
, (unsigned)PAGE_SIZE
- offset
);
1822 if (gpa
== UNMAPPED_GVA
) {
1823 r
= X86EMUL_PROPAGATE_FAULT
;
1826 ret
= kvm_read_guest(vcpu
->kvm
, gpa
, data
, tocopy
);
1828 r
= X86EMUL_UNHANDLEABLE
;
1839 EXPORT_SYMBOL_GPL(emulator_read_std
);
1841 static int emulator_read_emulated(unsigned long addr
,
1844 struct kvm_vcpu
*vcpu
)
1846 struct kvm_io_device
*mmio_dev
;
1849 if (vcpu
->mmio_read_completed
) {
1850 memcpy(val
, vcpu
->mmio_data
, bytes
);
1851 vcpu
->mmio_read_completed
= 0;
1852 return X86EMUL_CONTINUE
;
1855 gpa
= vcpu
->arch
.mmu
.gva_to_gpa(vcpu
, addr
);
1857 /* For APIC access vmexit */
1858 if ((gpa
& PAGE_MASK
) == APIC_DEFAULT_PHYS_BASE
)
1861 if (emulator_read_std(addr
, val
, bytes
, vcpu
)
1862 == X86EMUL_CONTINUE
)
1863 return X86EMUL_CONTINUE
;
1864 if (gpa
== UNMAPPED_GVA
)
1865 return X86EMUL_PROPAGATE_FAULT
;
1869 * Is this MMIO handled locally?
1871 mutex_lock(&vcpu
->kvm
->lock
);
1872 mmio_dev
= vcpu_find_mmio_dev(vcpu
, gpa
);
1874 kvm_iodevice_read(mmio_dev
, gpa
, bytes
, val
);
1875 mutex_unlock(&vcpu
->kvm
->lock
);
1876 return X86EMUL_CONTINUE
;
1878 mutex_unlock(&vcpu
->kvm
->lock
);
1880 vcpu
->mmio_needed
= 1;
1881 vcpu
->mmio_phys_addr
= gpa
;
1882 vcpu
->mmio_size
= bytes
;
1883 vcpu
->mmio_is_write
= 0;
1885 return X86EMUL_UNHANDLEABLE
;
1888 int emulator_write_phys(struct kvm_vcpu
*vcpu
, gpa_t gpa
,
1889 const void *val
, int bytes
)
1893 ret
= kvm_write_guest(vcpu
->kvm
, gpa
, val
, bytes
);
1896 kvm_mmu_pte_write(vcpu
, gpa
, val
, bytes
);
1900 static int emulator_write_emulated_onepage(unsigned long addr
,
1903 struct kvm_vcpu
*vcpu
)
1905 struct kvm_io_device
*mmio_dev
;
1908 gpa
= vcpu
->arch
.mmu
.gva_to_gpa(vcpu
, addr
);
1910 if (gpa
== UNMAPPED_GVA
) {
1911 kvm_inject_page_fault(vcpu
, addr
, 2);
1912 return X86EMUL_PROPAGATE_FAULT
;
1915 /* For APIC access vmexit */
1916 if ((gpa
& PAGE_MASK
) == APIC_DEFAULT_PHYS_BASE
)
1919 if (emulator_write_phys(vcpu
, gpa
, val
, bytes
))
1920 return X86EMUL_CONTINUE
;
1924 * Is this MMIO handled locally?
1926 mutex_lock(&vcpu
->kvm
->lock
);
1927 mmio_dev
= vcpu_find_mmio_dev(vcpu
, gpa
);
1929 kvm_iodevice_write(mmio_dev
, gpa
, bytes
, val
);
1930 mutex_unlock(&vcpu
->kvm
->lock
);
1931 return X86EMUL_CONTINUE
;
1933 mutex_unlock(&vcpu
->kvm
->lock
);
1935 vcpu
->mmio_needed
= 1;
1936 vcpu
->mmio_phys_addr
= gpa
;
1937 vcpu
->mmio_size
= bytes
;
1938 vcpu
->mmio_is_write
= 1;
1939 memcpy(vcpu
->mmio_data
, val
, bytes
);
1941 return X86EMUL_CONTINUE
;
1944 int emulator_write_emulated(unsigned long addr
,
1947 struct kvm_vcpu
*vcpu
)
1949 /* Crossing a page boundary? */
1950 if (((addr
+ bytes
- 1) ^ addr
) & PAGE_MASK
) {
1953 now
= -addr
& ~PAGE_MASK
;
1954 rc
= emulator_write_emulated_onepage(addr
, val
, now
, vcpu
);
1955 if (rc
!= X86EMUL_CONTINUE
)
1961 return emulator_write_emulated_onepage(addr
, val
, bytes
, vcpu
);
1963 EXPORT_SYMBOL_GPL(emulator_write_emulated
);
1965 static int emulator_cmpxchg_emulated(unsigned long addr
,
1969 struct kvm_vcpu
*vcpu
)
1971 static int reported
;
1975 printk(KERN_WARNING
"kvm: emulating exchange as write\n");
1977 #ifndef CONFIG_X86_64
1978 /* guests cmpxchg8b have to be emulated atomically */
1985 gpa
= vcpu
->arch
.mmu
.gva_to_gpa(vcpu
, addr
);
1987 if (gpa
== UNMAPPED_GVA
||
1988 (gpa
& PAGE_MASK
) == APIC_DEFAULT_PHYS_BASE
)
1991 if (((gpa
+ bytes
- 1) & PAGE_MASK
) != (gpa
& PAGE_MASK
))
1996 down_read(¤t
->mm
->mmap_sem
);
1997 page
= gfn_to_page(vcpu
->kvm
, gpa
>> PAGE_SHIFT
);
1998 up_read(¤t
->mm
->mmap_sem
);
2000 kaddr
= kmap_atomic(page
, KM_USER0
);
2001 set_64bit((u64
*)(kaddr
+ offset_in_page(gpa
)), val
);
2002 kunmap_atomic(kaddr
, KM_USER0
);
2003 kvm_release_page_dirty(page
);
2008 return emulator_write_emulated(addr
, new, bytes
, vcpu
);
2011 static unsigned long get_segment_base(struct kvm_vcpu
*vcpu
, int seg
)
2013 return kvm_x86_ops
->get_segment_base(vcpu
, seg
);
2016 int emulate_invlpg(struct kvm_vcpu
*vcpu
, gva_t address
)
2018 return X86EMUL_CONTINUE
;
2021 int emulate_clts(struct kvm_vcpu
*vcpu
)
2023 kvm_x86_ops
->set_cr0(vcpu
, vcpu
->arch
.cr0
& ~X86_CR0_TS
);
2024 return X86EMUL_CONTINUE
;
2027 int emulator_get_dr(struct x86_emulate_ctxt
*ctxt
, int dr
, unsigned long *dest
)
2029 struct kvm_vcpu
*vcpu
= ctxt
->vcpu
;
2033 *dest
= kvm_x86_ops
->get_dr(vcpu
, dr
);
2034 return X86EMUL_CONTINUE
;
2036 pr_unimpl(vcpu
, "%s: unexpected dr %u\n", __func__
, dr
);
2037 return X86EMUL_UNHANDLEABLE
;
2041 int emulator_set_dr(struct x86_emulate_ctxt
*ctxt
, int dr
, unsigned long value
)
2043 unsigned long mask
= (ctxt
->mode
== X86EMUL_MODE_PROT64
) ? ~0ULL : ~0U;
2046 kvm_x86_ops
->set_dr(ctxt
->vcpu
, dr
, value
& mask
, &exception
);
2048 /* FIXME: better handling */
2049 return X86EMUL_UNHANDLEABLE
;
2051 return X86EMUL_CONTINUE
;
2054 void kvm_report_emulation_failure(struct kvm_vcpu
*vcpu
, const char *context
)
2056 static int reported
;
2058 unsigned long rip
= vcpu
->arch
.rip
;
2059 unsigned long rip_linear
;
2061 rip_linear
= rip
+ get_segment_base(vcpu
, VCPU_SREG_CS
);
2066 emulator_read_std(rip_linear
, (void *)opcodes
, 4, vcpu
);
2068 printk(KERN_ERR
"emulation failed (%s) rip %lx %02x %02x %02x %02x\n",
2069 context
, rip
, opcodes
[0], opcodes
[1], opcodes
[2], opcodes
[3]);
2072 EXPORT_SYMBOL_GPL(kvm_report_emulation_failure
);
2074 static struct x86_emulate_ops emulate_ops
= {
2075 .read_std
= emulator_read_std
,
2076 .read_emulated
= emulator_read_emulated
,
2077 .write_emulated
= emulator_write_emulated
,
2078 .cmpxchg_emulated
= emulator_cmpxchg_emulated
,
2081 int emulate_instruction(struct kvm_vcpu
*vcpu
,
2082 struct kvm_run
*run
,
2088 struct decode_cache
*c
;
2090 vcpu
->arch
.mmio_fault_cr2
= cr2
;
2091 kvm_x86_ops
->cache_regs(vcpu
);
2093 vcpu
->mmio_is_write
= 0;
2094 vcpu
->arch
.pio
.string
= 0;
2096 if (!(emulation_type
& EMULTYPE_NO_DECODE
)) {
2098 kvm_x86_ops
->get_cs_db_l_bits(vcpu
, &cs_db
, &cs_l
);
2100 vcpu
->arch
.emulate_ctxt
.vcpu
= vcpu
;
2101 vcpu
->arch
.emulate_ctxt
.eflags
= kvm_x86_ops
->get_rflags(vcpu
);
2102 vcpu
->arch
.emulate_ctxt
.mode
=
2103 (vcpu
->arch
.emulate_ctxt
.eflags
& X86_EFLAGS_VM
)
2104 ? X86EMUL_MODE_REAL
: cs_l
2105 ? X86EMUL_MODE_PROT64
: cs_db
2106 ? X86EMUL_MODE_PROT32
: X86EMUL_MODE_PROT16
;
2108 if (vcpu
->arch
.emulate_ctxt
.mode
== X86EMUL_MODE_PROT64
) {
2109 vcpu
->arch
.emulate_ctxt
.cs_base
= 0;
2110 vcpu
->arch
.emulate_ctxt
.ds_base
= 0;
2111 vcpu
->arch
.emulate_ctxt
.es_base
= 0;
2112 vcpu
->arch
.emulate_ctxt
.ss_base
= 0;
2114 vcpu
->arch
.emulate_ctxt
.cs_base
=
2115 get_segment_base(vcpu
, VCPU_SREG_CS
);
2116 vcpu
->arch
.emulate_ctxt
.ds_base
=
2117 get_segment_base(vcpu
, VCPU_SREG_DS
);
2118 vcpu
->arch
.emulate_ctxt
.es_base
=
2119 get_segment_base(vcpu
, VCPU_SREG_ES
);
2120 vcpu
->arch
.emulate_ctxt
.ss_base
=
2121 get_segment_base(vcpu
, VCPU_SREG_SS
);
2124 vcpu
->arch
.emulate_ctxt
.gs_base
=
2125 get_segment_base(vcpu
, VCPU_SREG_GS
);
2126 vcpu
->arch
.emulate_ctxt
.fs_base
=
2127 get_segment_base(vcpu
, VCPU_SREG_FS
);
2129 r
= x86_decode_insn(&vcpu
->arch
.emulate_ctxt
, &emulate_ops
);
2131 /* Reject the instructions other than VMCALL/VMMCALL when
2132 * try to emulate invalid opcode */
2133 c
= &vcpu
->arch
.emulate_ctxt
.decode
;
2134 if ((emulation_type
& EMULTYPE_TRAP_UD
) &&
2135 (!(c
->twobyte
&& c
->b
== 0x01 &&
2136 (c
->modrm_reg
== 0 || c
->modrm_reg
== 3) &&
2137 c
->modrm_mod
== 3 && c
->modrm_rm
== 1)))
2138 return EMULATE_FAIL
;
2140 ++vcpu
->stat
.insn_emulation
;
2142 ++vcpu
->stat
.insn_emulation_fail
;
2143 if (kvm_mmu_unprotect_page_virt(vcpu
, cr2
))
2144 return EMULATE_DONE
;
2145 return EMULATE_FAIL
;
2149 r
= x86_emulate_insn(&vcpu
->arch
.emulate_ctxt
, &emulate_ops
);
2151 if (vcpu
->arch
.pio
.string
)
2152 return EMULATE_DO_MMIO
;
2154 if ((r
|| vcpu
->mmio_is_write
) && run
) {
2155 run
->exit_reason
= KVM_EXIT_MMIO
;
2156 run
->mmio
.phys_addr
= vcpu
->mmio_phys_addr
;
2157 memcpy(run
->mmio
.data
, vcpu
->mmio_data
, 8);
2158 run
->mmio
.len
= vcpu
->mmio_size
;
2159 run
->mmio
.is_write
= vcpu
->mmio_is_write
;
2163 if (kvm_mmu_unprotect_page_virt(vcpu
, cr2
))
2164 return EMULATE_DONE
;
2165 if (!vcpu
->mmio_needed
) {
2166 kvm_report_emulation_failure(vcpu
, "mmio");
2167 return EMULATE_FAIL
;
2169 return EMULATE_DO_MMIO
;
2172 kvm_x86_ops
->decache_regs(vcpu
);
2173 kvm_x86_ops
->set_rflags(vcpu
, vcpu
->arch
.emulate_ctxt
.eflags
);
2175 if (vcpu
->mmio_is_write
) {
2176 vcpu
->mmio_needed
= 0;
2177 return EMULATE_DO_MMIO
;
2180 return EMULATE_DONE
;
2182 EXPORT_SYMBOL_GPL(emulate_instruction
);
2184 static void free_pio_guest_pages(struct kvm_vcpu
*vcpu
)
2188 for (i
= 0; i
< ARRAY_SIZE(vcpu
->arch
.pio
.guest_pages
); ++i
)
2189 if (vcpu
->arch
.pio
.guest_pages
[i
]) {
2190 kvm_release_page_dirty(vcpu
->arch
.pio
.guest_pages
[i
]);
2191 vcpu
->arch
.pio
.guest_pages
[i
] = NULL
;
2195 static int pio_copy_data(struct kvm_vcpu
*vcpu
)
2197 void *p
= vcpu
->arch
.pio_data
;
2200 int nr_pages
= vcpu
->arch
.pio
.guest_pages
[1] ? 2 : 1;
2202 q
= vmap(vcpu
->arch
.pio
.guest_pages
, nr_pages
, VM_READ
|VM_WRITE
,
2205 free_pio_guest_pages(vcpu
);
2208 q
+= vcpu
->arch
.pio
.guest_page_offset
;
2209 bytes
= vcpu
->arch
.pio
.size
* vcpu
->arch
.pio
.cur_count
;
2210 if (vcpu
->arch
.pio
.in
)
2211 memcpy(q
, p
, bytes
);
2213 memcpy(p
, q
, bytes
);
2214 q
-= vcpu
->arch
.pio
.guest_page_offset
;
2216 free_pio_guest_pages(vcpu
);
2220 int complete_pio(struct kvm_vcpu
*vcpu
)
2222 struct kvm_pio_request
*io
= &vcpu
->arch
.pio
;
2226 kvm_x86_ops
->cache_regs(vcpu
);
2230 memcpy(&vcpu
->arch
.regs
[VCPU_REGS_RAX
], vcpu
->arch
.pio_data
,
2234 r
= pio_copy_data(vcpu
);
2236 kvm_x86_ops
->cache_regs(vcpu
);
2243 delta
*= io
->cur_count
;
2245 * The size of the register should really depend on
2246 * current address size.
2248 vcpu
->arch
.regs
[VCPU_REGS_RCX
] -= delta
;
2254 vcpu
->arch
.regs
[VCPU_REGS_RDI
] += delta
;
2256 vcpu
->arch
.regs
[VCPU_REGS_RSI
] += delta
;
2259 kvm_x86_ops
->decache_regs(vcpu
);
2261 io
->count
-= io
->cur_count
;
2267 static void kernel_pio(struct kvm_io_device
*pio_dev
,
2268 struct kvm_vcpu
*vcpu
,
2271 /* TODO: String I/O for in kernel device */
2273 mutex_lock(&vcpu
->kvm
->lock
);
2274 if (vcpu
->arch
.pio
.in
)
2275 kvm_iodevice_read(pio_dev
, vcpu
->arch
.pio
.port
,
2276 vcpu
->arch
.pio
.size
,
2279 kvm_iodevice_write(pio_dev
, vcpu
->arch
.pio
.port
,
2280 vcpu
->arch
.pio
.size
,
2282 mutex_unlock(&vcpu
->kvm
->lock
);
2285 static void pio_string_write(struct kvm_io_device
*pio_dev
,
2286 struct kvm_vcpu
*vcpu
)
2288 struct kvm_pio_request
*io
= &vcpu
->arch
.pio
;
2289 void *pd
= vcpu
->arch
.pio_data
;
2292 mutex_lock(&vcpu
->kvm
->lock
);
2293 for (i
= 0; i
< io
->cur_count
; i
++) {
2294 kvm_iodevice_write(pio_dev
, io
->port
,
2299 mutex_unlock(&vcpu
->kvm
->lock
);
2302 static struct kvm_io_device
*vcpu_find_pio_dev(struct kvm_vcpu
*vcpu
,
2305 return kvm_io_bus_find_dev(&vcpu
->kvm
->pio_bus
, addr
);
2308 int kvm_emulate_pio(struct kvm_vcpu
*vcpu
, struct kvm_run
*run
, int in
,
2309 int size
, unsigned port
)
2311 struct kvm_io_device
*pio_dev
;
2313 vcpu
->run
->exit_reason
= KVM_EXIT_IO
;
2314 vcpu
->run
->io
.direction
= in
? KVM_EXIT_IO_IN
: KVM_EXIT_IO_OUT
;
2315 vcpu
->run
->io
.size
= vcpu
->arch
.pio
.size
= size
;
2316 vcpu
->run
->io
.data_offset
= KVM_PIO_PAGE_OFFSET
* PAGE_SIZE
;
2317 vcpu
->run
->io
.count
= vcpu
->arch
.pio
.count
= vcpu
->arch
.pio
.cur_count
= 1;
2318 vcpu
->run
->io
.port
= vcpu
->arch
.pio
.port
= port
;
2319 vcpu
->arch
.pio
.in
= in
;
2320 vcpu
->arch
.pio
.string
= 0;
2321 vcpu
->arch
.pio
.down
= 0;
2322 vcpu
->arch
.pio
.guest_page_offset
= 0;
2323 vcpu
->arch
.pio
.rep
= 0;
2325 if (vcpu
->run
->io
.direction
== KVM_EXIT_IO_IN
)
2326 KVMTRACE_2D(IO_READ
, vcpu
, vcpu
->run
->io
.port
, (u32
)size
,
2329 KVMTRACE_2D(IO_WRITE
, vcpu
, vcpu
->run
->io
.port
, (u32
)size
,
2332 kvm_x86_ops
->cache_regs(vcpu
);
2333 memcpy(vcpu
->arch
.pio_data
, &vcpu
->arch
.regs
[VCPU_REGS_RAX
], 4);
2334 kvm_x86_ops
->decache_regs(vcpu
);
2336 kvm_x86_ops
->skip_emulated_instruction(vcpu
);
2338 pio_dev
= vcpu_find_pio_dev(vcpu
, port
);
2340 kernel_pio(pio_dev
, vcpu
, vcpu
->arch
.pio_data
);
2346 EXPORT_SYMBOL_GPL(kvm_emulate_pio
);
2348 int kvm_emulate_pio_string(struct kvm_vcpu
*vcpu
, struct kvm_run
*run
, int in
,
2349 int size
, unsigned long count
, int down
,
2350 gva_t address
, int rep
, unsigned port
)
2352 unsigned now
, in_page
;
2356 struct kvm_io_device
*pio_dev
;
2358 vcpu
->run
->exit_reason
= KVM_EXIT_IO
;
2359 vcpu
->run
->io
.direction
= in
? KVM_EXIT_IO_IN
: KVM_EXIT_IO_OUT
;
2360 vcpu
->run
->io
.size
= vcpu
->arch
.pio
.size
= size
;
2361 vcpu
->run
->io
.data_offset
= KVM_PIO_PAGE_OFFSET
* PAGE_SIZE
;
2362 vcpu
->run
->io
.count
= vcpu
->arch
.pio
.count
= vcpu
->arch
.pio
.cur_count
= count
;
2363 vcpu
->run
->io
.port
= vcpu
->arch
.pio
.port
= port
;
2364 vcpu
->arch
.pio
.in
= in
;
2365 vcpu
->arch
.pio
.string
= 1;
2366 vcpu
->arch
.pio
.down
= down
;
2367 vcpu
->arch
.pio
.guest_page_offset
= offset_in_page(address
);
2368 vcpu
->arch
.pio
.rep
= rep
;
2370 if (vcpu
->run
->io
.direction
== KVM_EXIT_IO_IN
)
2371 KVMTRACE_2D(IO_READ
, vcpu
, vcpu
->run
->io
.port
, (u32
)size
,
2374 KVMTRACE_2D(IO_WRITE
, vcpu
, vcpu
->run
->io
.port
, (u32
)size
,
2378 kvm_x86_ops
->skip_emulated_instruction(vcpu
);
2383 in_page
= PAGE_SIZE
- offset_in_page(address
);
2385 in_page
= offset_in_page(address
) + size
;
2386 now
= min(count
, (unsigned long)in_page
/ size
);
2389 * String I/O straddles page boundary. Pin two guest pages
2390 * so that we satisfy atomicity constraints. Do just one
2391 * transaction to avoid complexity.
2398 * String I/O in reverse. Yuck. Kill the guest, fix later.
2400 pr_unimpl(vcpu
, "guest string pio down\n");
2401 kvm_inject_gp(vcpu
, 0);
2404 vcpu
->run
->io
.count
= now
;
2405 vcpu
->arch
.pio
.cur_count
= now
;
2407 if (vcpu
->arch
.pio
.cur_count
== vcpu
->arch
.pio
.count
)
2408 kvm_x86_ops
->skip_emulated_instruction(vcpu
);
2410 for (i
= 0; i
< nr_pages
; ++i
) {
2411 page
= gva_to_page(vcpu
, address
+ i
* PAGE_SIZE
);
2412 vcpu
->arch
.pio
.guest_pages
[i
] = page
;
2414 kvm_inject_gp(vcpu
, 0);
2415 free_pio_guest_pages(vcpu
);
2420 pio_dev
= vcpu_find_pio_dev(vcpu
, port
);
2421 if (!vcpu
->arch
.pio
.in
) {
2422 /* string PIO write */
2423 ret
= pio_copy_data(vcpu
);
2424 if (ret
>= 0 && pio_dev
) {
2425 pio_string_write(pio_dev
, vcpu
);
2427 if (vcpu
->arch
.pio
.count
== 0)
2431 pr_unimpl(vcpu
, "no string pio read support yet, "
2432 "port %x size %d count %ld\n",
2437 EXPORT_SYMBOL_GPL(kvm_emulate_pio_string
);
2439 int kvm_arch_init(void *opaque
)
2442 struct kvm_x86_ops
*ops
= (struct kvm_x86_ops
*)opaque
;
2445 printk(KERN_ERR
"kvm: already loaded the other module\n");
2450 if (!ops
->cpu_has_kvm_support()) {
2451 printk(KERN_ERR
"kvm: no hardware support\n");
2455 if (ops
->disabled_by_bios()) {
2456 printk(KERN_ERR
"kvm: disabled by bios\n");
2461 r
= kvm_mmu_module_init();
2465 kvm_init_msr_list();
2468 kvm_mmu_set_nonpresent_ptes(0ull, 0ull);
2469 kvm_mmu_set_base_ptes(PT_PRESENT_MASK
);
2470 kvm_mmu_set_mask_ptes(PT_USER_MASK
, PT_ACCESSED_MASK
,
2471 PT_DIRTY_MASK
, PT64_NX_MASK
, 0);
2478 void kvm_arch_exit(void)
2481 kvm_mmu_module_exit();
2484 int kvm_emulate_halt(struct kvm_vcpu
*vcpu
)
2486 ++vcpu
->stat
.halt_exits
;
2487 KVMTRACE_0D(HLT
, vcpu
, handler
);
2488 if (irqchip_in_kernel(vcpu
->kvm
)) {
2489 vcpu
->arch
.mp_state
= KVM_MP_STATE_HALTED
;
2490 up_read(&vcpu
->kvm
->slots_lock
);
2491 kvm_vcpu_block(vcpu
);
2492 down_read(&vcpu
->kvm
->slots_lock
);
2493 if (vcpu
->arch
.mp_state
!= KVM_MP_STATE_RUNNABLE
)
2497 vcpu
->run
->exit_reason
= KVM_EXIT_HLT
;
2501 EXPORT_SYMBOL_GPL(kvm_emulate_halt
);
2503 static inline gpa_t
hc_gpa(struct kvm_vcpu
*vcpu
, unsigned long a0
,
2506 if (is_long_mode(vcpu
))
2509 return a0
| ((gpa_t
)a1
<< 32);
2512 int kvm_emulate_hypercall(struct kvm_vcpu
*vcpu
)
2514 unsigned long nr
, a0
, a1
, a2
, a3
, ret
;
2517 kvm_x86_ops
->cache_regs(vcpu
);
2519 nr
= vcpu
->arch
.regs
[VCPU_REGS_RAX
];
2520 a0
= vcpu
->arch
.regs
[VCPU_REGS_RBX
];
2521 a1
= vcpu
->arch
.regs
[VCPU_REGS_RCX
];
2522 a2
= vcpu
->arch
.regs
[VCPU_REGS_RDX
];
2523 a3
= vcpu
->arch
.regs
[VCPU_REGS_RSI
];
2525 KVMTRACE_1D(VMMCALL
, vcpu
, (u32
)nr
, handler
);
2527 if (!is_long_mode(vcpu
)) {
2536 case KVM_HC_VAPIC_POLL_IRQ
:
2540 r
= kvm_pv_mmu_op(vcpu
, a0
, hc_gpa(vcpu
, a1
, a2
), &ret
);
2546 vcpu
->arch
.regs
[VCPU_REGS_RAX
] = ret
;
2547 kvm_x86_ops
->decache_regs(vcpu
);
2548 ++vcpu
->stat
.hypercalls
;
2551 EXPORT_SYMBOL_GPL(kvm_emulate_hypercall
);
2553 int kvm_fix_hypercall(struct kvm_vcpu
*vcpu
)
2555 char instruction
[3];
2560 * Blow out the MMU to ensure that no other VCPU has an active mapping
2561 * to ensure that the updated hypercall appears atomically across all
2564 kvm_mmu_zap_all(vcpu
->kvm
);
2566 kvm_x86_ops
->cache_regs(vcpu
);
2567 kvm_x86_ops
->patch_hypercall(vcpu
, instruction
);
2568 if (emulator_write_emulated(vcpu
->arch
.rip
, instruction
, 3, vcpu
)
2569 != X86EMUL_CONTINUE
)
2575 static u64
mk_cr_64(u64 curr_cr
, u32 new_val
)
2577 return (curr_cr
& ~((1ULL << 32) - 1)) | new_val
;
2580 void realmode_lgdt(struct kvm_vcpu
*vcpu
, u16 limit
, unsigned long base
)
2582 struct descriptor_table dt
= { limit
, base
};
2584 kvm_x86_ops
->set_gdt(vcpu
, &dt
);
2587 void realmode_lidt(struct kvm_vcpu
*vcpu
, u16 limit
, unsigned long base
)
2589 struct descriptor_table dt
= { limit
, base
};
2591 kvm_x86_ops
->set_idt(vcpu
, &dt
);
2594 void realmode_lmsw(struct kvm_vcpu
*vcpu
, unsigned long msw
,
2595 unsigned long *rflags
)
2597 kvm_lmsw(vcpu
, msw
);
2598 *rflags
= kvm_x86_ops
->get_rflags(vcpu
);
2601 unsigned long realmode_get_cr(struct kvm_vcpu
*vcpu
, int cr
)
2603 kvm_x86_ops
->decache_cr4_guest_bits(vcpu
);
2606 return vcpu
->arch
.cr0
;
2608 return vcpu
->arch
.cr2
;
2610 return vcpu
->arch
.cr3
;
2612 return vcpu
->arch
.cr4
;
2614 return kvm_get_cr8(vcpu
);
2616 vcpu_printf(vcpu
, "%s: unexpected cr %u\n", __func__
, cr
);
2621 void realmode_set_cr(struct kvm_vcpu
*vcpu
, int cr
, unsigned long val
,
2622 unsigned long *rflags
)
2626 kvm_set_cr0(vcpu
, mk_cr_64(vcpu
->arch
.cr0
, val
));
2627 *rflags
= kvm_x86_ops
->get_rflags(vcpu
);
2630 vcpu
->arch
.cr2
= val
;
2633 kvm_set_cr3(vcpu
, val
);
2636 kvm_set_cr4(vcpu
, mk_cr_64(vcpu
->arch
.cr4
, val
));
2639 kvm_set_cr8(vcpu
, val
& 0xfUL
);
2642 vcpu_printf(vcpu
, "%s: unexpected cr %u\n", __func__
, cr
);
2646 static int move_to_next_stateful_cpuid_entry(struct kvm_vcpu
*vcpu
, int i
)
2648 struct kvm_cpuid_entry2
*e
= &vcpu
->arch
.cpuid_entries
[i
];
2649 int j
, nent
= vcpu
->arch
.cpuid_nent
;
2651 e
->flags
&= ~KVM_CPUID_FLAG_STATE_READ_NEXT
;
2652 /* when no next entry is found, the current entry[i] is reselected */
2653 for (j
= i
+ 1; j
== i
; j
= (j
+ 1) % nent
) {
2654 struct kvm_cpuid_entry2
*ej
= &vcpu
->arch
.cpuid_entries
[j
];
2655 if (ej
->function
== e
->function
) {
2656 ej
->flags
|= KVM_CPUID_FLAG_STATE_READ_NEXT
;
2660 return 0; /* silence gcc, even though control never reaches here */
2663 /* find an entry with matching function, matching index (if needed), and that
2664 * should be read next (if it's stateful) */
2665 static int is_matching_cpuid_entry(struct kvm_cpuid_entry2
*e
,
2666 u32 function
, u32 index
)
2668 if (e
->function
!= function
)
2670 if ((e
->flags
& KVM_CPUID_FLAG_SIGNIFCANT_INDEX
) && e
->index
!= index
)
2672 if ((e
->flags
& KVM_CPUID_FLAG_STATEFUL_FUNC
) &&
2673 !(e
->flags
& KVM_CPUID_FLAG_STATE_READ_NEXT
))
2678 void kvm_emulate_cpuid(struct kvm_vcpu
*vcpu
)
2681 u32 function
, index
;
2682 struct kvm_cpuid_entry2
*e
, *best
;
2684 kvm_x86_ops
->cache_regs(vcpu
);
2685 function
= vcpu
->arch
.regs
[VCPU_REGS_RAX
];
2686 index
= vcpu
->arch
.regs
[VCPU_REGS_RCX
];
2687 vcpu
->arch
.regs
[VCPU_REGS_RAX
] = 0;
2688 vcpu
->arch
.regs
[VCPU_REGS_RBX
] = 0;
2689 vcpu
->arch
.regs
[VCPU_REGS_RCX
] = 0;
2690 vcpu
->arch
.regs
[VCPU_REGS_RDX
] = 0;
2692 for (i
= 0; i
< vcpu
->arch
.cpuid_nent
; ++i
) {
2693 e
= &vcpu
->arch
.cpuid_entries
[i
];
2694 if (is_matching_cpuid_entry(e
, function
, index
)) {
2695 if (e
->flags
& KVM_CPUID_FLAG_STATEFUL_FUNC
)
2696 move_to_next_stateful_cpuid_entry(vcpu
, i
);
2701 * Both basic or both extended?
2703 if (((e
->function
^ function
) & 0x80000000) == 0)
2704 if (!best
|| e
->function
> best
->function
)
2708 vcpu
->arch
.regs
[VCPU_REGS_RAX
] = best
->eax
;
2709 vcpu
->arch
.regs
[VCPU_REGS_RBX
] = best
->ebx
;
2710 vcpu
->arch
.regs
[VCPU_REGS_RCX
] = best
->ecx
;
2711 vcpu
->arch
.regs
[VCPU_REGS_RDX
] = best
->edx
;
2713 kvm_x86_ops
->decache_regs(vcpu
);
2714 kvm_x86_ops
->skip_emulated_instruction(vcpu
);
2715 KVMTRACE_5D(CPUID
, vcpu
, function
,
2716 (u32
)vcpu
->arch
.regs
[VCPU_REGS_RAX
],
2717 (u32
)vcpu
->arch
.regs
[VCPU_REGS_RBX
],
2718 (u32
)vcpu
->arch
.regs
[VCPU_REGS_RCX
],
2719 (u32
)vcpu
->arch
.regs
[VCPU_REGS_RDX
], handler
);
2721 EXPORT_SYMBOL_GPL(kvm_emulate_cpuid
);
2724 * Check if userspace requested an interrupt window, and that the
2725 * interrupt window is open.
2727 * No need to exit to userspace if we already have an interrupt queued.
2729 static int dm_request_for_irq_injection(struct kvm_vcpu
*vcpu
,
2730 struct kvm_run
*kvm_run
)
2732 return (!vcpu
->arch
.irq_summary
&&
2733 kvm_run
->request_interrupt_window
&&
2734 vcpu
->arch
.interrupt_window_open
&&
2735 (kvm_x86_ops
->get_rflags(vcpu
) & X86_EFLAGS_IF
));
2738 static void post_kvm_run_save(struct kvm_vcpu
*vcpu
,
2739 struct kvm_run
*kvm_run
)
2741 kvm_run
->if_flag
= (kvm_x86_ops
->get_rflags(vcpu
) & X86_EFLAGS_IF
) != 0;
2742 kvm_run
->cr8
= kvm_get_cr8(vcpu
);
2743 kvm_run
->apic_base
= kvm_get_apic_base(vcpu
);
2744 if (irqchip_in_kernel(vcpu
->kvm
))
2745 kvm_run
->ready_for_interrupt_injection
= 1;
2747 kvm_run
->ready_for_interrupt_injection
=
2748 (vcpu
->arch
.interrupt_window_open
&&
2749 vcpu
->arch
.irq_summary
== 0);
2752 static void vapic_enter(struct kvm_vcpu
*vcpu
)
2754 struct kvm_lapic
*apic
= vcpu
->arch
.apic
;
2757 if (!apic
|| !apic
->vapic_addr
)
2760 down_read(¤t
->mm
->mmap_sem
);
2761 page
= gfn_to_page(vcpu
->kvm
, apic
->vapic_addr
>> PAGE_SHIFT
);
2762 up_read(¤t
->mm
->mmap_sem
);
2764 vcpu
->arch
.apic
->vapic_page
= page
;
2767 static void vapic_exit(struct kvm_vcpu
*vcpu
)
2769 struct kvm_lapic
*apic
= vcpu
->arch
.apic
;
2771 if (!apic
|| !apic
->vapic_addr
)
2774 kvm_release_page_dirty(apic
->vapic_page
);
2775 mark_page_dirty(vcpu
->kvm
, apic
->vapic_addr
>> PAGE_SHIFT
);
2778 static int __vcpu_run(struct kvm_vcpu
*vcpu
, struct kvm_run
*kvm_run
)
2782 if (unlikely(vcpu
->arch
.mp_state
== KVM_MP_STATE_SIPI_RECEIVED
)) {
2783 pr_debug("vcpu %d received sipi with vector # %x\n",
2784 vcpu
->vcpu_id
, vcpu
->arch
.sipi_vector
);
2785 kvm_lapic_reset(vcpu
);
2786 r
= kvm_x86_ops
->vcpu_reset(vcpu
);
2789 vcpu
->arch
.mp_state
= KVM_MP_STATE_RUNNABLE
;
2792 down_read(&vcpu
->kvm
->slots_lock
);
2796 if (vcpu
->guest_debug
.enabled
)
2797 kvm_x86_ops
->guest_debug_pre(vcpu
);
2801 if (test_and_clear_bit(KVM_REQ_MMU_RELOAD
, &vcpu
->requests
))
2802 kvm_mmu_unload(vcpu
);
2804 r
= kvm_mmu_reload(vcpu
);
2808 if (vcpu
->requests
) {
2809 if (test_and_clear_bit(KVM_REQ_MIGRATE_TIMER
, &vcpu
->requests
))
2810 __kvm_migrate_timers(vcpu
);
2811 if (test_and_clear_bit(KVM_REQ_TLB_FLUSH
, &vcpu
->requests
))
2812 kvm_x86_ops
->tlb_flush(vcpu
);
2813 if (test_and_clear_bit(KVM_REQ_REPORT_TPR_ACCESS
,
2815 kvm_run
->exit_reason
= KVM_EXIT_TPR_ACCESS
;
2819 if (test_and_clear_bit(KVM_REQ_TRIPLE_FAULT
, &vcpu
->requests
)) {
2820 kvm_run
->exit_reason
= KVM_EXIT_SHUTDOWN
;
2826 clear_bit(KVM_REQ_PENDING_TIMER
, &vcpu
->requests
);
2827 kvm_inject_pending_timer_irqs(vcpu
);
2831 kvm_x86_ops
->prepare_guest_switch(vcpu
);
2832 kvm_load_guest_fpu(vcpu
);
2834 local_irq_disable();
2836 if (vcpu
->requests
|| need_resched()) {
2843 if (signal_pending(current
)) {
2847 kvm_run
->exit_reason
= KVM_EXIT_INTR
;
2848 ++vcpu
->stat
.signal_exits
;
2852 vcpu
->guest_mode
= 1;
2854 * Make sure that guest_mode assignment won't happen after
2855 * testing the pending IRQ vector bitmap.
2859 if (vcpu
->arch
.exception
.pending
)
2860 __queue_exception(vcpu
);
2861 else if (irqchip_in_kernel(vcpu
->kvm
))
2862 kvm_x86_ops
->inject_pending_irq(vcpu
);
2864 kvm_x86_ops
->inject_pending_vectors(vcpu
, kvm_run
);
2866 kvm_lapic_sync_to_vapic(vcpu
);
2868 up_read(&vcpu
->kvm
->slots_lock
);
2873 KVMTRACE_0D(VMENTRY
, vcpu
, entryexit
);
2874 kvm_x86_ops
->run(vcpu
, kvm_run
);
2876 vcpu
->guest_mode
= 0;
2882 * We must have an instruction between local_irq_enable() and
2883 * kvm_guest_exit(), so the timer interrupt isn't delayed by
2884 * the interrupt shadow. The stat.exits increment will do nicely.
2885 * But we need to prevent reordering, hence this barrier():
2893 down_read(&vcpu
->kvm
->slots_lock
);
2896 * Profile KVM exit RIPs:
2898 if (unlikely(prof_on
== KVM_PROFILING
)) {
2899 kvm_x86_ops
->cache_regs(vcpu
);
2900 profile_hit(KVM_PROFILING
, (void *)vcpu
->arch
.rip
);
2903 if (vcpu
->arch
.exception
.pending
&& kvm_x86_ops
->exception_injected(vcpu
))
2904 vcpu
->arch
.exception
.pending
= false;
2906 kvm_lapic_sync_from_vapic(vcpu
);
2908 r
= kvm_x86_ops
->handle_exit(kvm_run
, vcpu
);
2911 if (dm_request_for_irq_injection(vcpu
, kvm_run
)) {
2913 kvm_run
->exit_reason
= KVM_EXIT_INTR
;
2914 ++vcpu
->stat
.request_irq_exits
;
2917 if (!need_resched())
2922 up_read(&vcpu
->kvm
->slots_lock
);
2925 down_read(&vcpu
->kvm
->slots_lock
);
2929 post_kvm_run_save(vcpu
, kvm_run
);
2931 down_read(&vcpu
->kvm
->slots_lock
);
2933 up_read(&vcpu
->kvm
->slots_lock
);
2938 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu
*vcpu
, struct kvm_run
*kvm_run
)
2945 if (unlikely(vcpu
->arch
.mp_state
== KVM_MP_STATE_UNINITIALIZED
)) {
2946 kvm_vcpu_block(vcpu
);
2951 if (vcpu
->sigset_active
)
2952 sigprocmask(SIG_SETMASK
, &vcpu
->sigset
, &sigsaved
);
2954 /* re-sync apic's tpr */
2955 if (!irqchip_in_kernel(vcpu
->kvm
))
2956 kvm_set_cr8(vcpu
, kvm_run
->cr8
);
2958 if (vcpu
->arch
.pio
.cur_count
) {
2959 r
= complete_pio(vcpu
);
2963 #if CONFIG_HAS_IOMEM
2964 if (vcpu
->mmio_needed
) {
2965 memcpy(vcpu
->mmio_data
, kvm_run
->mmio
.data
, 8);
2966 vcpu
->mmio_read_completed
= 1;
2967 vcpu
->mmio_needed
= 0;
2969 down_read(&vcpu
->kvm
->slots_lock
);
2970 r
= emulate_instruction(vcpu
, kvm_run
,
2971 vcpu
->arch
.mmio_fault_cr2
, 0,
2972 EMULTYPE_NO_DECODE
);
2973 up_read(&vcpu
->kvm
->slots_lock
);
2974 if (r
== EMULATE_DO_MMIO
) {
2976 * Read-modify-write. Back to userspace.
2983 if (kvm_run
->exit_reason
== KVM_EXIT_HYPERCALL
) {
2984 kvm_x86_ops
->cache_regs(vcpu
);
2985 vcpu
->arch
.regs
[VCPU_REGS_RAX
] = kvm_run
->hypercall
.ret
;
2986 kvm_x86_ops
->decache_regs(vcpu
);
2989 r
= __vcpu_run(vcpu
, kvm_run
);
2992 if (vcpu
->sigset_active
)
2993 sigprocmask(SIG_SETMASK
, &sigsaved
, NULL
);
2999 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu
*vcpu
, struct kvm_regs
*regs
)
3003 kvm_x86_ops
->cache_regs(vcpu
);
3005 regs
->rax
= vcpu
->arch
.regs
[VCPU_REGS_RAX
];
3006 regs
->rbx
= vcpu
->arch
.regs
[VCPU_REGS_RBX
];
3007 regs
->rcx
= vcpu
->arch
.regs
[VCPU_REGS_RCX
];
3008 regs
->rdx
= vcpu
->arch
.regs
[VCPU_REGS_RDX
];
3009 regs
->rsi
= vcpu
->arch
.regs
[VCPU_REGS_RSI
];
3010 regs
->rdi
= vcpu
->arch
.regs
[VCPU_REGS_RDI
];
3011 regs
->rsp
= vcpu
->arch
.regs
[VCPU_REGS_RSP
];
3012 regs
->rbp
= vcpu
->arch
.regs
[VCPU_REGS_RBP
];
3013 #ifdef CONFIG_X86_64
3014 regs
->r8
= vcpu
->arch
.regs
[VCPU_REGS_R8
];
3015 regs
->r9
= vcpu
->arch
.regs
[VCPU_REGS_R9
];
3016 regs
->r10
= vcpu
->arch
.regs
[VCPU_REGS_R10
];
3017 regs
->r11
= vcpu
->arch
.regs
[VCPU_REGS_R11
];
3018 regs
->r12
= vcpu
->arch
.regs
[VCPU_REGS_R12
];
3019 regs
->r13
= vcpu
->arch
.regs
[VCPU_REGS_R13
];
3020 regs
->r14
= vcpu
->arch
.regs
[VCPU_REGS_R14
];
3021 regs
->r15
= vcpu
->arch
.regs
[VCPU_REGS_R15
];
3024 regs
->rip
= vcpu
->arch
.rip
;
3025 regs
->rflags
= kvm_x86_ops
->get_rflags(vcpu
);
3028 * Don't leak debug flags in case they were set for guest debugging
3030 if (vcpu
->guest_debug
.enabled
&& vcpu
->guest_debug
.singlestep
)
3031 regs
->rflags
&= ~(X86_EFLAGS_TF
| X86_EFLAGS_RF
);
3038 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu
*vcpu
, struct kvm_regs
*regs
)
3042 vcpu
->arch
.regs
[VCPU_REGS_RAX
] = regs
->rax
;
3043 vcpu
->arch
.regs
[VCPU_REGS_RBX
] = regs
->rbx
;
3044 vcpu
->arch
.regs
[VCPU_REGS_RCX
] = regs
->rcx
;
3045 vcpu
->arch
.regs
[VCPU_REGS_RDX
] = regs
->rdx
;
3046 vcpu
->arch
.regs
[VCPU_REGS_RSI
] = regs
->rsi
;
3047 vcpu
->arch
.regs
[VCPU_REGS_RDI
] = regs
->rdi
;
3048 vcpu
->arch
.regs
[VCPU_REGS_RSP
] = regs
->rsp
;
3049 vcpu
->arch
.regs
[VCPU_REGS_RBP
] = regs
->rbp
;
3050 #ifdef CONFIG_X86_64
3051 vcpu
->arch
.regs
[VCPU_REGS_R8
] = regs
->r8
;
3052 vcpu
->arch
.regs
[VCPU_REGS_R9
] = regs
->r9
;
3053 vcpu
->arch
.regs
[VCPU_REGS_R10
] = regs
->r10
;
3054 vcpu
->arch
.regs
[VCPU_REGS_R11
] = regs
->r11
;
3055 vcpu
->arch
.regs
[VCPU_REGS_R12
] = regs
->r12
;
3056 vcpu
->arch
.regs
[VCPU_REGS_R13
] = regs
->r13
;
3057 vcpu
->arch
.regs
[VCPU_REGS_R14
] = regs
->r14
;
3058 vcpu
->arch
.regs
[VCPU_REGS_R15
] = regs
->r15
;
3061 vcpu
->arch
.rip
= regs
->rip
;
3062 kvm_x86_ops
->set_rflags(vcpu
, regs
->rflags
);
3064 kvm_x86_ops
->decache_regs(vcpu
);
3066 vcpu
->arch
.exception
.pending
= false;
3073 static void get_segment(struct kvm_vcpu
*vcpu
,
3074 struct kvm_segment
*var
, int seg
)
3076 kvm_x86_ops
->get_segment(vcpu
, var
, seg
);
3079 void kvm_get_cs_db_l_bits(struct kvm_vcpu
*vcpu
, int *db
, int *l
)
3081 struct kvm_segment cs
;
3083 get_segment(vcpu
, &cs
, VCPU_SREG_CS
);
3087 EXPORT_SYMBOL_GPL(kvm_get_cs_db_l_bits
);
3089 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu
*vcpu
,
3090 struct kvm_sregs
*sregs
)
3092 struct descriptor_table dt
;
3097 get_segment(vcpu
, &sregs
->cs
, VCPU_SREG_CS
);
3098 get_segment(vcpu
, &sregs
->ds
, VCPU_SREG_DS
);
3099 get_segment(vcpu
, &sregs
->es
, VCPU_SREG_ES
);
3100 get_segment(vcpu
, &sregs
->fs
, VCPU_SREG_FS
);
3101 get_segment(vcpu
, &sregs
->gs
, VCPU_SREG_GS
);
3102 get_segment(vcpu
, &sregs
->ss
, VCPU_SREG_SS
);
3104 get_segment(vcpu
, &sregs
->tr
, VCPU_SREG_TR
);
3105 get_segment(vcpu
, &sregs
->ldt
, VCPU_SREG_LDTR
);
3107 kvm_x86_ops
->get_idt(vcpu
, &dt
);
3108 sregs
->idt
.limit
= dt
.limit
;
3109 sregs
->idt
.base
= dt
.base
;
3110 kvm_x86_ops
->get_gdt(vcpu
, &dt
);
3111 sregs
->gdt
.limit
= dt
.limit
;
3112 sregs
->gdt
.base
= dt
.base
;
3114 kvm_x86_ops
->decache_cr4_guest_bits(vcpu
);
3115 sregs
->cr0
= vcpu
->arch
.cr0
;
3116 sregs
->cr2
= vcpu
->arch
.cr2
;
3117 sregs
->cr3
= vcpu
->arch
.cr3
;
3118 sregs
->cr4
= vcpu
->arch
.cr4
;
3119 sregs
->cr8
= kvm_get_cr8(vcpu
);
3120 sregs
->efer
= vcpu
->arch
.shadow_efer
;
3121 sregs
->apic_base
= kvm_get_apic_base(vcpu
);
3123 if (irqchip_in_kernel(vcpu
->kvm
)) {
3124 memset(sregs
->interrupt_bitmap
, 0,
3125 sizeof sregs
->interrupt_bitmap
);
3126 pending_vec
= kvm_x86_ops
->get_irq(vcpu
);
3127 if (pending_vec
>= 0)
3128 set_bit(pending_vec
,
3129 (unsigned long *)sregs
->interrupt_bitmap
);
3131 memcpy(sregs
->interrupt_bitmap
, vcpu
->arch
.irq_pending
,
3132 sizeof sregs
->interrupt_bitmap
);
3139 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu
*vcpu
,
3140 struct kvm_mp_state
*mp_state
)
3143 mp_state
->mp_state
= vcpu
->arch
.mp_state
;
3148 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu
*vcpu
,
3149 struct kvm_mp_state
*mp_state
)
3152 vcpu
->arch
.mp_state
= mp_state
->mp_state
;
3157 static void set_segment(struct kvm_vcpu
*vcpu
,
3158 struct kvm_segment
*var
, int seg
)
3160 kvm_x86_ops
->set_segment(vcpu
, var
, seg
);
3163 static void seg_desct_to_kvm_desct(struct desc_struct
*seg_desc
, u16 selector
,
3164 struct kvm_segment
*kvm_desct
)
3166 kvm_desct
->base
= seg_desc
->base0
;
3167 kvm_desct
->base
|= seg_desc
->base1
<< 16;
3168 kvm_desct
->base
|= seg_desc
->base2
<< 24;
3169 kvm_desct
->limit
= seg_desc
->limit0
;
3170 kvm_desct
->limit
|= seg_desc
->limit
<< 16;
3171 kvm_desct
->selector
= selector
;
3172 kvm_desct
->type
= seg_desc
->type
;
3173 kvm_desct
->present
= seg_desc
->p
;
3174 kvm_desct
->dpl
= seg_desc
->dpl
;
3175 kvm_desct
->db
= seg_desc
->d
;
3176 kvm_desct
->s
= seg_desc
->s
;
3177 kvm_desct
->l
= seg_desc
->l
;
3178 kvm_desct
->g
= seg_desc
->g
;
3179 kvm_desct
->avl
= seg_desc
->avl
;
3181 kvm_desct
->unusable
= 1;
3183 kvm_desct
->unusable
= 0;
3184 kvm_desct
->padding
= 0;
3187 static void get_segment_descritptor_dtable(struct kvm_vcpu
*vcpu
,
3189 struct descriptor_table
*dtable
)
3191 if (selector
& 1 << 2) {
3192 struct kvm_segment kvm_seg
;
3194 get_segment(vcpu
, &kvm_seg
, VCPU_SREG_LDTR
);
3196 if (kvm_seg
.unusable
)
3199 dtable
->limit
= kvm_seg
.limit
;
3200 dtable
->base
= kvm_seg
.base
;
3203 kvm_x86_ops
->get_gdt(vcpu
, dtable
);
3206 /* allowed just for 8 bytes segments */
3207 static int load_guest_segment_descriptor(struct kvm_vcpu
*vcpu
, u16 selector
,
3208 struct desc_struct
*seg_desc
)
3210 struct descriptor_table dtable
;
3211 u16 index
= selector
>> 3;
3213 get_segment_descritptor_dtable(vcpu
, selector
, &dtable
);
3215 if (dtable
.limit
< index
* 8 + 7) {
3216 kvm_queue_exception_e(vcpu
, GP_VECTOR
, selector
& 0xfffc);
3219 return kvm_read_guest(vcpu
->kvm
, dtable
.base
+ index
* 8, seg_desc
, 8);
3222 /* allowed just for 8 bytes segments */
3223 static int save_guest_segment_descriptor(struct kvm_vcpu
*vcpu
, u16 selector
,
3224 struct desc_struct
*seg_desc
)
3226 struct descriptor_table dtable
;
3227 u16 index
= selector
>> 3;
3229 get_segment_descritptor_dtable(vcpu
, selector
, &dtable
);
3231 if (dtable
.limit
< index
* 8 + 7)
3233 return kvm_write_guest(vcpu
->kvm
, dtable
.base
+ index
* 8, seg_desc
, 8);
3236 static u32
get_tss_base_addr(struct kvm_vcpu
*vcpu
,
3237 struct desc_struct
*seg_desc
)
3241 base_addr
= seg_desc
->base0
;
3242 base_addr
|= (seg_desc
->base1
<< 16);
3243 base_addr
|= (seg_desc
->base2
<< 24);
3248 static int load_tss_segment32(struct kvm_vcpu
*vcpu
,
3249 struct desc_struct
*seg_desc
,
3250 struct tss_segment_32
*tss
)
3254 base_addr
= get_tss_base_addr(vcpu
, seg_desc
);
3256 return kvm_read_guest(vcpu
->kvm
, base_addr
, tss
,
3257 sizeof(struct tss_segment_32
));
3260 static int save_tss_segment32(struct kvm_vcpu
*vcpu
,
3261 struct desc_struct
*seg_desc
,
3262 struct tss_segment_32
*tss
)
3266 base_addr
= get_tss_base_addr(vcpu
, seg_desc
);
3268 return kvm_write_guest(vcpu
->kvm
, base_addr
, tss
,
3269 sizeof(struct tss_segment_32
));
3272 static int load_tss_segment16(struct kvm_vcpu
*vcpu
,
3273 struct desc_struct
*seg_desc
,
3274 struct tss_segment_16
*tss
)
3278 base_addr
= get_tss_base_addr(vcpu
, seg_desc
);
3280 return kvm_read_guest(vcpu
->kvm
, base_addr
, tss
,
3281 sizeof(struct tss_segment_16
));
3284 static int save_tss_segment16(struct kvm_vcpu
*vcpu
,
3285 struct desc_struct
*seg_desc
,
3286 struct tss_segment_16
*tss
)
3290 base_addr
= get_tss_base_addr(vcpu
, seg_desc
);
3292 return kvm_write_guest(vcpu
->kvm
, base_addr
, tss
,
3293 sizeof(struct tss_segment_16
));
3296 static u16
get_segment_selector(struct kvm_vcpu
*vcpu
, int seg
)
3298 struct kvm_segment kvm_seg
;
3300 get_segment(vcpu
, &kvm_seg
, seg
);
3301 return kvm_seg
.selector
;
3304 static int load_segment_descriptor_to_kvm_desct(struct kvm_vcpu
*vcpu
,
3306 struct kvm_segment
*kvm_seg
)
3308 struct desc_struct seg_desc
;
3310 if (load_guest_segment_descriptor(vcpu
, selector
, &seg_desc
))
3312 seg_desct_to_kvm_desct(&seg_desc
, selector
, kvm_seg
);
3316 static int load_segment_descriptor(struct kvm_vcpu
*vcpu
, u16 selector
,
3317 int type_bits
, int seg
)
3319 struct kvm_segment kvm_seg
;
3321 if (load_segment_descriptor_to_kvm_desct(vcpu
, selector
, &kvm_seg
))
3323 kvm_seg
.type
|= type_bits
;
3325 if (seg
!= VCPU_SREG_SS
&& seg
!= VCPU_SREG_CS
&&
3326 seg
!= VCPU_SREG_LDTR
)
3328 kvm_seg
.unusable
= 1;
3330 set_segment(vcpu
, &kvm_seg
, seg
);
3334 static void save_state_to_tss32(struct kvm_vcpu
*vcpu
,
3335 struct tss_segment_32
*tss
)
3337 tss
->cr3
= vcpu
->arch
.cr3
;
3338 tss
->eip
= vcpu
->arch
.rip
;
3339 tss
->eflags
= kvm_x86_ops
->get_rflags(vcpu
);
3340 tss
->eax
= vcpu
->arch
.regs
[VCPU_REGS_RAX
];
3341 tss
->ecx
= vcpu
->arch
.regs
[VCPU_REGS_RCX
];
3342 tss
->edx
= vcpu
->arch
.regs
[VCPU_REGS_RDX
];
3343 tss
->ebx
= vcpu
->arch
.regs
[VCPU_REGS_RBX
];
3344 tss
->esp
= vcpu
->arch
.regs
[VCPU_REGS_RSP
];
3345 tss
->ebp
= vcpu
->arch
.regs
[VCPU_REGS_RBP
];
3346 tss
->esi
= vcpu
->arch
.regs
[VCPU_REGS_RSI
];
3347 tss
->edi
= vcpu
->arch
.regs
[VCPU_REGS_RDI
];
3349 tss
->es
= get_segment_selector(vcpu
, VCPU_SREG_ES
);
3350 tss
->cs
= get_segment_selector(vcpu
, VCPU_SREG_CS
);
3351 tss
->ss
= get_segment_selector(vcpu
, VCPU_SREG_SS
);
3352 tss
->ds
= get_segment_selector(vcpu
, VCPU_SREG_DS
);
3353 tss
->fs
= get_segment_selector(vcpu
, VCPU_SREG_FS
);
3354 tss
->gs
= get_segment_selector(vcpu
, VCPU_SREG_GS
);
3355 tss
->ldt_selector
= get_segment_selector(vcpu
, VCPU_SREG_LDTR
);
3356 tss
->prev_task_link
= get_segment_selector(vcpu
, VCPU_SREG_TR
);
3359 static int load_state_from_tss32(struct kvm_vcpu
*vcpu
,
3360 struct tss_segment_32
*tss
)
3362 kvm_set_cr3(vcpu
, tss
->cr3
);
3364 vcpu
->arch
.rip
= tss
->eip
;
3365 kvm_x86_ops
->set_rflags(vcpu
, tss
->eflags
| 2);
3367 vcpu
->arch
.regs
[VCPU_REGS_RAX
] = tss
->eax
;
3368 vcpu
->arch
.regs
[VCPU_REGS_RCX
] = tss
->ecx
;
3369 vcpu
->arch
.regs
[VCPU_REGS_RDX
] = tss
->edx
;
3370 vcpu
->arch
.regs
[VCPU_REGS_RBX
] = tss
->ebx
;
3371 vcpu
->arch
.regs
[VCPU_REGS_RSP
] = tss
->esp
;
3372 vcpu
->arch
.regs
[VCPU_REGS_RBP
] = tss
->ebp
;
3373 vcpu
->arch
.regs
[VCPU_REGS_RSI
] = tss
->esi
;
3374 vcpu
->arch
.regs
[VCPU_REGS_RDI
] = tss
->edi
;
3376 if (load_segment_descriptor(vcpu
, tss
->ldt_selector
, 0, VCPU_SREG_LDTR
))
3379 if (load_segment_descriptor(vcpu
, tss
->es
, 1, VCPU_SREG_ES
))
3382 if (load_segment_descriptor(vcpu
, tss
->cs
, 9, VCPU_SREG_CS
))
3385 if (load_segment_descriptor(vcpu
, tss
->ss
, 1, VCPU_SREG_SS
))
3388 if (load_segment_descriptor(vcpu
, tss
->ds
, 1, VCPU_SREG_DS
))
3391 if (load_segment_descriptor(vcpu
, tss
->fs
, 1, VCPU_SREG_FS
))
3394 if (load_segment_descriptor(vcpu
, tss
->gs
, 1, VCPU_SREG_GS
))
3399 static void save_state_to_tss16(struct kvm_vcpu
*vcpu
,
3400 struct tss_segment_16
*tss
)
3402 tss
->ip
= vcpu
->arch
.rip
;
3403 tss
->flag
= kvm_x86_ops
->get_rflags(vcpu
);
3404 tss
->ax
= vcpu
->arch
.regs
[VCPU_REGS_RAX
];
3405 tss
->cx
= vcpu
->arch
.regs
[VCPU_REGS_RCX
];
3406 tss
->dx
= vcpu
->arch
.regs
[VCPU_REGS_RDX
];
3407 tss
->bx
= vcpu
->arch
.regs
[VCPU_REGS_RBX
];
3408 tss
->sp
= vcpu
->arch
.regs
[VCPU_REGS_RSP
];
3409 tss
->bp
= vcpu
->arch
.regs
[VCPU_REGS_RBP
];
3410 tss
->si
= vcpu
->arch
.regs
[VCPU_REGS_RSI
];
3411 tss
->di
= vcpu
->arch
.regs
[VCPU_REGS_RDI
];
3413 tss
->es
= get_segment_selector(vcpu
, VCPU_SREG_ES
);
3414 tss
->cs
= get_segment_selector(vcpu
, VCPU_SREG_CS
);
3415 tss
->ss
= get_segment_selector(vcpu
, VCPU_SREG_SS
);
3416 tss
->ds
= get_segment_selector(vcpu
, VCPU_SREG_DS
);
3417 tss
->ldt
= get_segment_selector(vcpu
, VCPU_SREG_LDTR
);
3418 tss
->prev_task_link
= get_segment_selector(vcpu
, VCPU_SREG_TR
);
3421 static int load_state_from_tss16(struct kvm_vcpu
*vcpu
,
3422 struct tss_segment_16
*tss
)
3424 vcpu
->arch
.rip
= tss
->ip
;
3425 kvm_x86_ops
->set_rflags(vcpu
, tss
->flag
| 2);
3426 vcpu
->arch
.regs
[VCPU_REGS_RAX
] = tss
->ax
;
3427 vcpu
->arch
.regs
[VCPU_REGS_RCX
] = tss
->cx
;
3428 vcpu
->arch
.regs
[VCPU_REGS_RDX
] = tss
->dx
;
3429 vcpu
->arch
.regs
[VCPU_REGS_RBX
] = tss
->bx
;
3430 vcpu
->arch
.regs
[VCPU_REGS_RSP
] = tss
->sp
;
3431 vcpu
->arch
.regs
[VCPU_REGS_RBP
] = tss
->bp
;
3432 vcpu
->arch
.regs
[VCPU_REGS_RSI
] = tss
->si
;
3433 vcpu
->arch
.regs
[VCPU_REGS_RDI
] = tss
->di
;
3435 if (load_segment_descriptor(vcpu
, tss
->ldt
, 0, VCPU_SREG_LDTR
))
3438 if (load_segment_descriptor(vcpu
, tss
->es
, 1, VCPU_SREG_ES
))
3441 if (load_segment_descriptor(vcpu
, tss
->cs
, 9, VCPU_SREG_CS
))
3444 if (load_segment_descriptor(vcpu
, tss
->ss
, 1, VCPU_SREG_SS
))
3447 if (load_segment_descriptor(vcpu
, tss
->ds
, 1, VCPU_SREG_DS
))
3452 int kvm_task_switch_16(struct kvm_vcpu
*vcpu
, u16 tss_selector
,
3453 struct desc_struct
*cseg_desc
,
3454 struct desc_struct
*nseg_desc
)
3456 struct tss_segment_16 tss_segment_16
;
3459 if (load_tss_segment16(vcpu
, cseg_desc
, &tss_segment_16
))
3462 save_state_to_tss16(vcpu
, &tss_segment_16
);
3463 save_tss_segment16(vcpu
, cseg_desc
, &tss_segment_16
);
3465 if (load_tss_segment16(vcpu
, nseg_desc
, &tss_segment_16
))
3467 if (load_state_from_tss16(vcpu
, &tss_segment_16
))
3475 int kvm_task_switch_32(struct kvm_vcpu
*vcpu
, u16 tss_selector
,
3476 struct desc_struct
*cseg_desc
,
3477 struct desc_struct
*nseg_desc
)
3479 struct tss_segment_32 tss_segment_32
;
3482 if (load_tss_segment32(vcpu
, cseg_desc
, &tss_segment_32
))
3485 save_state_to_tss32(vcpu
, &tss_segment_32
);
3486 save_tss_segment32(vcpu
, cseg_desc
, &tss_segment_32
);
3488 if (load_tss_segment32(vcpu
, nseg_desc
, &tss_segment_32
))
3490 if (load_state_from_tss32(vcpu
, &tss_segment_32
))
3498 int kvm_task_switch(struct kvm_vcpu
*vcpu
, u16 tss_selector
, int reason
)
3500 struct kvm_segment tr_seg
;
3501 struct desc_struct cseg_desc
;
3502 struct desc_struct nseg_desc
;
3505 get_segment(vcpu
, &tr_seg
, VCPU_SREG_TR
);
3507 if (load_guest_segment_descriptor(vcpu
, tss_selector
, &nseg_desc
))
3510 if (load_guest_segment_descriptor(vcpu
, tr_seg
.selector
, &cseg_desc
))
3514 if (reason
!= TASK_SWITCH_IRET
) {
3517 cpl
= kvm_x86_ops
->get_cpl(vcpu
);
3518 if ((tss_selector
& 3) > nseg_desc
.dpl
|| cpl
> nseg_desc
.dpl
) {
3519 kvm_queue_exception_e(vcpu
, GP_VECTOR
, 0);
3524 if (!nseg_desc
.p
|| (nseg_desc
.limit0
| nseg_desc
.limit
<< 16) < 0x67) {
3525 kvm_queue_exception_e(vcpu
, TS_VECTOR
, tss_selector
& 0xfffc);
3529 if (reason
== TASK_SWITCH_IRET
|| reason
== TASK_SWITCH_JMP
) {
3530 cseg_desc
.type
&= ~(1 << 1); //clear the B flag
3531 save_guest_segment_descriptor(vcpu
, tr_seg
.selector
,
3535 if (reason
== TASK_SWITCH_IRET
) {
3536 u32 eflags
= kvm_x86_ops
->get_rflags(vcpu
);
3537 kvm_x86_ops
->set_rflags(vcpu
, eflags
& ~X86_EFLAGS_NT
);
3540 kvm_x86_ops
->skip_emulated_instruction(vcpu
);
3541 kvm_x86_ops
->cache_regs(vcpu
);
3543 if (nseg_desc
.type
& 8)
3544 ret
= kvm_task_switch_32(vcpu
, tss_selector
, &cseg_desc
,
3547 ret
= kvm_task_switch_16(vcpu
, tss_selector
, &cseg_desc
,
3550 if (reason
== TASK_SWITCH_CALL
|| reason
== TASK_SWITCH_GATE
) {
3551 u32 eflags
= kvm_x86_ops
->get_rflags(vcpu
);
3552 kvm_x86_ops
->set_rflags(vcpu
, eflags
| X86_EFLAGS_NT
);
3555 if (reason
!= TASK_SWITCH_IRET
) {
3556 nseg_desc
.type
|= (1 << 1);
3557 save_guest_segment_descriptor(vcpu
, tss_selector
,
3561 kvm_x86_ops
->set_cr0(vcpu
, vcpu
->arch
.cr0
| X86_CR0_TS
);
3562 seg_desct_to_kvm_desct(&nseg_desc
, tss_selector
, &tr_seg
);
3564 set_segment(vcpu
, &tr_seg
, VCPU_SREG_TR
);
3566 kvm_x86_ops
->decache_regs(vcpu
);
3569 EXPORT_SYMBOL_GPL(kvm_task_switch
);
3571 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu
*vcpu
,
3572 struct kvm_sregs
*sregs
)
3574 int mmu_reset_needed
= 0;
3575 int i
, pending_vec
, max_bits
;
3576 struct descriptor_table dt
;
3580 dt
.limit
= sregs
->idt
.limit
;
3581 dt
.base
= sregs
->idt
.base
;
3582 kvm_x86_ops
->set_idt(vcpu
, &dt
);
3583 dt
.limit
= sregs
->gdt
.limit
;
3584 dt
.base
= sregs
->gdt
.base
;
3585 kvm_x86_ops
->set_gdt(vcpu
, &dt
);
3587 vcpu
->arch
.cr2
= sregs
->cr2
;
3588 mmu_reset_needed
|= vcpu
->arch
.cr3
!= sregs
->cr3
;
3589 vcpu
->arch
.cr3
= sregs
->cr3
;
3591 kvm_set_cr8(vcpu
, sregs
->cr8
);
3593 mmu_reset_needed
|= vcpu
->arch
.shadow_efer
!= sregs
->efer
;
3594 kvm_x86_ops
->set_efer(vcpu
, sregs
->efer
);
3595 kvm_set_apic_base(vcpu
, sregs
->apic_base
);
3597 kvm_x86_ops
->decache_cr4_guest_bits(vcpu
);
3599 mmu_reset_needed
|= vcpu
->arch
.cr0
!= sregs
->cr0
;
3600 kvm_x86_ops
->set_cr0(vcpu
, sregs
->cr0
);
3601 vcpu
->arch
.cr0
= sregs
->cr0
;
3603 mmu_reset_needed
|= vcpu
->arch
.cr4
!= sregs
->cr4
;
3604 kvm_x86_ops
->set_cr4(vcpu
, sregs
->cr4
);
3605 if (!is_long_mode(vcpu
) && is_pae(vcpu
))
3606 load_pdptrs(vcpu
, vcpu
->arch
.cr3
);
3608 if (mmu_reset_needed
)
3609 kvm_mmu_reset_context(vcpu
);
3611 if (!irqchip_in_kernel(vcpu
->kvm
)) {
3612 memcpy(vcpu
->arch
.irq_pending
, sregs
->interrupt_bitmap
,
3613 sizeof vcpu
->arch
.irq_pending
);
3614 vcpu
->arch
.irq_summary
= 0;
3615 for (i
= 0; i
< ARRAY_SIZE(vcpu
->arch
.irq_pending
); ++i
)
3616 if (vcpu
->arch
.irq_pending
[i
])
3617 __set_bit(i
, &vcpu
->arch
.irq_summary
);
3619 max_bits
= (sizeof sregs
->interrupt_bitmap
) << 3;
3620 pending_vec
= find_first_bit(
3621 (const unsigned long *)sregs
->interrupt_bitmap
,
3623 /* Only pending external irq is handled here */
3624 if (pending_vec
< max_bits
) {
3625 kvm_x86_ops
->set_irq(vcpu
, pending_vec
);
3626 pr_debug("Set back pending irq %d\n",
3631 set_segment(vcpu
, &sregs
->cs
, VCPU_SREG_CS
);
3632 set_segment(vcpu
, &sregs
->ds
, VCPU_SREG_DS
);
3633 set_segment(vcpu
, &sregs
->es
, VCPU_SREG_ES
);
3634 set_segment(vcpu
, &sregs
->fs
, VCPU_SREG_FS
);
3635 set_segment(vcpu
, &sregs
->gs
, VCPU_SREG_GS
);
3636 set_segment(vcpu
, &sregs
->ss
, VCPU_SREG_SS
);
3638 set_segment(vcpu
, &sregs
->tr
, VCPU_SREG_TR
);
3639 set_segment(vcpu
, &sregs
->ldt
, VCPU_SREG_LDTR
);
3646 int kvm_arch_vcpu_ioctl_debug_guest(struct kvm_vcpu
*vcpu
,
3647 struct kvm_debug_guest
*dbg
)
3653 r
= kvm_x86_ops
->set_guest_debug(vcpu
, dbg
);
3661 * fxsave fpu state. Taken from x86_64/processor.h. To be killed when
3662 * we have asm/x86/processor.h
3673 u32 st_space
[32]; /* 8*16 bytes for each FP-reg = 128 bytes */
3674 #ifdef CONFIG_X86_64
3675 u32 xmm_space
[64]; /* 16*16 bytes for each XMM-reg = 256 bytes */
3677 u32 xmm_space
[32]; /* 8*16 bytes for each XMM-reg = 128 bytes */
3682 * Translate a guest virtual address to a guest physical address.
3684 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu
*vcpu
,
3685 struct kvm_translation
*tr
)
3687 unsigned long vaddr
= tr
->linear_address
;
3691 down_read(&vcpu
->kvm
->slots_lock
);
3692 gpa
= vcpu
->arch
.mmu
.gva_to_gpa(vcpu
, vaddr
);
3693 up_read(&vcpu
->kvm
->slots_lock
);
3694 tr
->physical_address
= gpa
;
3695 tr
->valid
= gpa
!= UNMAPPED_GVA
;
3703 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu
*vcpu
, struct kvm_fpu
*fpu
)
3705 struct fxsave
*fxsave
= (struct fxsave
*)&vcpu
->arch
.guest_fx_image
;
3709 memcpy(fpu
->fpr
, fxsave
->st_space
, 128);
3710 fpu
->fcw
= fxsave
->cwd
;
3711 fpu
->fsw
= fxsave
->swd
;
3712 fpu
->ftwx
= fxsave
->twd
;
3713 fpu
->last_opcode
= fxsave
->fop
;
3714 fpu
->last_ip
= fxsave
->rip
;
3715 fpu
->last_dp
= fxsave
->rdp
;
3716 memcpy(fpu
->xmm
, fxsave
->xmm_space
, sizeof fxsave
->xmm_space
);
3723 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu
*vcpu
, struct kvm_fpu
*fpu
)
3725 struct fxsave
*fxsave
= (struct fxsave
*)&vcpu
->arch
.guest_fx_image
;
3729 memcpy(fxsave
->st_space
, fpu
->fpr
, 128);
3730 fxsave
->cwd
= fpu
->fcw
;
3731 fxsave
->swd
= fpu
->fsw
;
3732 fxsave
->twd
= fpu
->ftwx
;
3733 fxsave
->fop
= fpu
->last_opcode
;
3734 fxsave
->rip
= fpu
->last_ip
;
3735 fxsave
->rdp
= fpu
->last_dp
;
3736 memcpy(fxsave
->xmm_space
, fpu
->xmm
, sizeof fxsave
->xmm_space
);
3743 void fx_init(struct kvm_vcpu
*vcpu
)
3745 unsigned after_mxcsr_mask
;
3748 * Touch the fpu the first time in non atomic context as if
3749 * this is the first fpu instruction the exception handler
3750 * will fire before the instruction returns and it'll have to
3751 * allocate ram with GFP_KERNEL.
3754 fx_save(&vcpu
->arch
.host_fx_image
);
3756 /* Initialize guest FPU by resetting ours and saving into guest's */
3758 fx_save(&vcpu
->arch
.host_fx_image
);
3760 fx_save(&vcpu
->arch
.guest_fx_image
);
3761 fx_restore(&vcpu
->arch
.host_fx_image
);
3764 vcpu
->arch
.cr0
|= X86_CR0_ET
;
3765 after_mxcsr_mask
= offsetof(struct i387_fxsave_struct
, st_space
);
3766 vcpu
->arch
.guest_fx_image
.mxcsr
= 0x1f80;
3767 memset((void *)&vcpu
->arch
.guest_fx_image
+ after_mxcsr_mask
,
3768 0, sizeof(struct i387_fxsave_struct
) - after_mxcsr_mask
);
3770 EXPORT_SYMBOL_GPL(fx_init
);
3772 void kvm_load_guest_fpu(struct kvm_vcpu
*vcpu
)
3774 if (!vcpu
->fpu_active
|| vcpu
->guest_fpu_loaded
)
3777 vcpu
->guest_fpu_loaded
= 1;
3778 fx_save(&vcpu
->arch
.host_fx_image
);
3779 fx_restore(&vcpu
->arch
.guest_fx_image
);
3781 EXPORT_SYMBOL_GPL(kvm_load_guest_fpu
);
3783 void kvm_put_guest_fpu(struct kvm_vcpu
*vcpu
)
3785 if (!vcpu
->guest_fpu_loaded
)
3788 vcpu
->guest_fpu_loaded
= 0;
3789 fx_save(&vcpu
->arch
.guest_fx_image
);
3790 fx_restore(&vcpu
->arch
.host_fx_image
);
3791 ++vcpu
->stat
.fpu_reload
;
3793 EXPORT_SYMBOL_GPL(kvm_put_guest_fpu
);
3795 void kvm_arch_vcpu_free(struct kvm_vcpu
*vcpu
)
3797 kvm_x86_ops
->vcpu_free(vcpu
);
3800 struct kvm_vcpu
*kvm_arch_vcpu_create(struct kvm
*kvm
,
3803 return kvm_x86_ops
->vcpu_create(kvm
, id
);
3806 int kvm_arch_vcpu_setup(struct kvm_vcpu
*vcpu
)
3810 /* We do fxsave: this must be aligned. */
3811 BUG_ON((unsigned long)&vcpu
->arch
.host_fx_image
& 0xF);
3814 r
= kvm_arch_vcpu_reset(vcpu
);
3816 r
= kvm_mmu_setup(vcpu
);
3823 kvm_x86_ops
->vcpu_free(vcpu
);
3827 void kvm_arch_vcpu_destroy(struct kvm_vcpu
*vcpu
)
3830 kvm_mmu_unload(vcpu
);
3833 kvm_x86_ops
->vcpu_free(vcpu
);
3836 int kvm_arch_vcpu_reset(struct kvm_vcpu
*vcpu
)
3838 return kvm_x86_ops
->vcpu_reset(vcpu
);
3841 void kvm_arch_hardware_enable(void *garbage
)
3843 kvm_x86_ops
->hardware_enable(garbage
);
3846 void kvm_arch_hardware_disable(void *garbage
)
3848 kvm_x86_ops
->hardware_disable(garbage
);
3851 int kvm_arch_hardware_setup(void)
3853 return kvm_x86_ops
->hardware_setup();
3856 void kvm_arch_hardware_unsetup(void)
3858 kvm_x86_ops
->hardware_unsetup();
3861 void kvm_arch_check_processor_compat(void *rtn
)
3863 kvm_x86_ops
->check_processor_compatibility(rtn
);
3866 int kvm_arch_vcpu_init(struct kvm_vcpu
*vcpu
)
3872 BUG_ON(vcpu
->kvm
== NULL
);
3875 vcpu
->arch
.mmu
.root_hpa
= INVALID_PAGE
;
3876 if (!irqchip_in_kernel(kvm
) || vcpu
->vcpu_id
== 0)
3877 vcpu
->arch
.mp_state
= KVM_MP_STATE_RUNNABLE
;
3879 vcpu
->arch
.mp_state
= KVM_MP_STATE_UNINITIALIZED
;
3881 page
= alloc_page(GFP_KERNEL
| __GFP_ZERO
);
3886 vcpu
->arch
.pio_data
= page_address(page
);
3888 r
= kvm_mmu_create(vcpu
);
3890 goto fail_free_pio_data
;
3892 if (irqchip_in_kernel(kvm
)) {
3893 r
= kvm_create_lapic(vcpu
);
3895 goto fail_mmu_destroy
;
3901 kvm_mmu_destroy(vcpu
);
3903 free_page((unsigned long)vcpu
->arch
.pio_data
);
3908 void kvm_arch_vcpu_uninit(struct kvm_vcpu
*vcpu
)
3910 kvm_free_lapic(vcpu
);
3911 down_read(&vcpu
->kvm
->slots_lock
);
3912 kvm_mmu_destroy(vcpu
);
3913 up_read(&vcpu
->kvm
->slots_lock
);
3914 free_page((unsigned long)vcpu
->arch
.pio_data
);
3917 struct kvm
*kvm_arch_create_vm(void)
3919 struct kvm
*kvm
= kzalloc(sizeof(struct kvm
), GFP_KERNEL
);
3922 return ERR_PTR(-ENOMEM
);
3924 INIT_LIST_HEAD(&kvm
->arch
.active_mmu_pages
);
3929 static void kvm_unload_vcpu_mmu(struct kvm_vcpu
*vcpu
)
3932 kvm_mmu_unload(vcpu
);
3936 static void kvm_free_vcpus(struct kvm
*kvm
)
3941 * Unpin any mmu pages first.
3943 for (i
= 0; i
< KVM_MAX_VCPUS
; ++i
)
3945 kvm_unload_vcpu_mmu(kvm
->vcpus
[i
]);
3946 for (i
= 0; i
< KVM_MAX_VCPUS
; ++i
) {
3947 if (kvm
->vcpus
[i
]) {
3948 kvm_arch_vcpu_free(kvm
->vcpus
[i
]);
3949 kvm
->vcpus
[i
] = NULL
;
3955 void kvm_arch_destroy_vm(struct kvm
*kvm
)
3958 kfree(kvm
->arch
.vpic
);
3959 kfree(kvm
->arch
.vioapic
);
3960 kvm_free_vcpus(kvm
);
3961 kvm_free_physmem(kvm
);
3962 if (kvm
->arch
.apic_access_page
)
3963 put_page(kvm
->arch
.apic_access_page
);
3964 if (kvm
->arch
.ept_identity_pagetable
)
3965 put_page(kvm
->arch
.ept_identity_pagetable
);
3969 int kvm_arch_set_memory_region(struct kvm
*kvm
,
3970 struct kvm_userspace_memory_region
*mem
,
3971 struct kvm_memory_slot old
,
3974 int npages
= mem
->memory_size
>> PAGE_SHIFT
;
3975 struct kvm_memory_slot
*memslot
= &kvm
->memslots
[mem
->slot
];
3977 /*To keep backward compatibility with older userspace,
3978 *x86 needs to hanlde !user_alloc case.
3981 if (npages
&& !old
.rmap
) {
3982 down_write(¤t
->mm
->mmap_sem
);
3983 memslot
->userspace_addr
= do_mmap(NULL
, 0,
3985 PROT_READ
| PROT_WRITE
,
3986 MAP_SHARED
| MAP_ANONYMOUS
,
3988 up_write(¤t
->mm
->mmap_sem
);
3990 if (IS_ERR((void *)memslot
->userspace_addr
))
3991 return PTR_ERR((void *)memslot
->userspace_addr
);
3993 if (!old
.user_alloc
&& old
.rmap
) {
3996 down_write(¤t
->mm
->mmap_sem
);
3997 ret
= do_munmap(current
->mm
, old
.userspace_addr
,
3998 old
.npages
* PAGE_SIZE
);
3999 up_write(¤t
->mm
->mmap_sem
);
4002 "kvm_vm_ioctl_set_memory_region: "
4003 "failed to munmap memory\n");
4008 if (!kvm
->arch
.n_requested_mmu_pages
) {
4009 unsigned int nr_mmu_pages
= kvm_mmu_calculate_mmu_pages(kvm
);
4010 kvm_mmu_change_mmu_pages(kvm
, nr_mmu_pages
);
4013 kvm_mmu_slot_remove_write_access(kvm
, mem
->slot
);
4014 kvm_flush_remote_tlbs(kvm
);
4019 int kvm_arch_vcpu_runnable(struct kvm_vcpu
*vcpu
)
4021 return vcpu
->arch
.mp_state
== KVM_MP_STATE_RUNNABLE
4022 || vcpu
->arch
.mp_state
== KVM_MP_STATE_SIPI_RECEIVED
;
4025 static void vcpu_kick_intr(void *info
)
4028 struct kvm_vcpu
*vcpu
= (struct kvm_vcpu
*)info
;
4029 printk(KERN_DEBUG
"vcpu_kick_intr %p \n", vcpu
);
4033 void kvm_vcpu_kick(struct kvm_vcpu
*vcpu
)
4035 int ipi_pcpu
= vcpu
->cpu
;
4036 int cpu
= get_cpu();
4038 if (waitqueue_active(&vcpu
->wq
)) {
4039 wake_up_interruptible(&vcpu
->wq
);
4040 ++vcpu
->stat
.halt_wakeup
;
4043 * We may be called synchronously with irqs disabled in guest mode,
4044 * So need not to call smp_call_function_single() in that case.
4046 if (vcpu
->guest_mode
&& vcpu
->cpu
!= cpu
)
4047 smp_call_function_single(ipi_pcpu
, vcpu_kick_intr
, vcpu
, 0);